diff --git a/README.md b/README.md
index a1515090..c727ac45 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,28 @@ $options = [
 ]
 $opentok = new OpenTok($apiKey, $apiSecret, $options);
 ```
+#### Migrating to Vonage Video API
+
+There is some useful behaviour on initialization in this SDK that will help as a stopgap before switching out from the
+legacy TokBok API to the new, Vonage Video API. To do this, you can pass in an Application ID for the API Key, and the path to
+a Vonage private key as the API Secret.
+
+```php
+use OpenTok\OpenTok;
+use MyCompany\CustomOpenTokClient;
+
+$applicationID = '61bb2dae-9b69-400c-9abb-642d082af5fc';
+$privateKey = './private.key';
+
+$opentok = new OpenTok($applicationID, $privateKey);
+```
+
+The SDK will notice that the authentiction has changed, and will automatically start to forward requests to the Vonage API Routes
+instead of the OpenTok API Routes. All requests and responses in your code should be exactly the same as they are on the
+OpenTok API.
+
+**NOTE:** The SDK will read the private key path from the root directory of your project (generally one level above the docroot
+of your application), so you will need to make sure that the path provided is either absolute, or relative to your project root.
 
 ### Creating Sessions
 
diff --git a/sample/Archiving/README.md b/sample/Archiving/README.md
index d4b6d009..df237c0a 100644
--- a/sample/Archiving/README.md
+++ b/sample/Archiving/README.md
@@ -19,7 +19,7 @@ Next, input your own API Key and API Secret into the `run-demo` script file:
 
 ```
   export API_KEY=0000000
-  export API_SECRET=abcdef1234567890abcdef01234567890abcdef
+  export API_SECRET=b60d0b2568f3ea9731bd9d3f71be263ce19f802f
 ```
 
 Finally, start the PHP CLI development server (requires PHP >= 5.4) using the `run-demo` script
diff --git a/src/OpenTok/Archive.php b/src/OpenTok/Archive.php
index 14cb0c68..27438157 100644
--- a/src/OpenTok/Archive.php
+++ b/src/OpenTok/Archive.php
@@ -144,8 +144,6 @@ public function __construct($archiveData, $options = array())
 
         $this->client = isset($client) ? $client : new Client();
         if (!$this->client->isConfigured()) {
-            Validators::validateApiKey($apiKey);
-            Validators::validateApiSecret($apiSecret);
             Validators::validateApiUrl($apiUrl);
 
             $this->client->configure($apiKey, $apiSecret, $apiUrl);
diff --git a/src/OpenTok/ArchiveList.php b/src/OpenTok/ArchiveList.php
index 2a927e9d..d9a51bc6 100644
--- a/src/OpenTok/ArchiveList.php
+++ b/src/OpenTok/ArchiveList.php
@@ -49,8 +49,6 @@ public function __construct($archiveListData, $options = array())
 
         $this->client = isset($client) ? $client : new Client();
         if (!$this->client->isConfigured()) {
-            Validators::validateApiKey($apiKey);
-            Validators::validateApiSecret($apiSecret);
             Validators::validateApiUrl($apiUrl);
 
             $this->client->configure($apiKey, $apiSecret, $apiUrl);
diff --git a/src/OpenTok/Broadcast.php b/src/OpenTok/Broadcast.php
index 9745a24b..0ea809fb 100644
--- a/src/OpenTok/Broadcast.php
+++ b/src/OpenTok/Broadcast.php
@@ -147,8 +147,6 @@ public function __construct($broadcastData, $options = array())
         $this->client = $options['client'] ?? new Client();
 
         if (!$this->client->isConfigured()) {
-            Validators::validateApiKey($options['apiKey']);
-            Validators::validateApiSecret($options['apiSecret']);
             Validators::validateApiUrl($options['apiUrl']);
 
             $this->client->configure($options['apiKey'], $options['apiSecret'], $options['apiUrl']);
diff --git a/src/OpenTok/OpenTok.php b/src/OpenTok/OpenTok.php
index a4ef38bc..c9027343 100644
--- a/src/OpenTok/OpenTok.php
+++ b/src/OpenTok/OpenTok.php
@@ -25,6 +25,9 @@
 * and the API secret for your <a href="https://tokbox.com/account">OpenTok Video API account</a>. Do not
 * publicly share your API secret. You will use it with the OpenTok() constructor (only on your web
 * server) to create OpenTok sessions.
+*
+* If you set api_key to a VONAGE_APPLICATION_ID and api_secret to a VONAGE_PRIVATE_KEY_PATH, the SDK
+* will hit Vonage Video with Vonage Auth instead.
 * <p>
 * Be sure to include the entire OpenTok server SDK on your web server.
 */
@@ -36,26 +39,40 @@ class OpenTok
     private $apiSecret;
     /** @internal */
     private $client;
-    /** @internal */
+
+    /**
+     * @var bool
+     * Override to determine whether to hit Vonage servers with Vonage Auth in requests
+     */
+    private $vonage = false;
+
+    /**
+     * @var array
+     * @internal
+     */
     public $options;
 
     /** @internal */
     public function __construct($apiKey, $apiSecret, $options = array())
     {
+        $apiUrl = 'https://api.opentok.com';
+
+        if (Validators::isVonageKeypair($apiKey, $apiSecret)) {
+            $this->vonage = true;
+            $apiUrl = 'https://video.api.vonage.com';
+        }
+
         // unpack optional arguments (merging with default values) into named variables
         $defaults = array(
-            'apiUrl' => 'https://api.opentok.com',
+            'apiUrl' => $apiUrl,
             'client' => null,
-            'timeout' => null // In the future we should set this to 2
+            'timeout' => null, // In the future we should set this to 2
         );
 
         $this->options = array_merge($defaults, array_intersect_key($options, $defaults));
 
         list($apiUrl, $client, $timeout) = array_values($this->options);
 
-        // validate arguments
-        Validators::validateApiKey($apiKey);
-        Validators::validateApiSecret($apiSecret);
         Validators::validateApiUrl($apiUrl);
         Validators::validateClient($client);
         Validators::validateDefaultTimeout($timeout);
diff --git a/src/OpenTok/Util/Client.php b/src/OpenTok/Util/Client.php
index 9771b332..0b4bb33a 100755
--- a/src/OpenTok/Util/Client.php
+++ b/src/OpenTok/Util/Client.php
@@ -36,6 +36,7 @@
 
 use OpenTok\Exception\ForceDisconnectAuthenticationException;
 use OpenTok\Exception\ForceDisconnectUnexpectedValueException;
+use Vonage\JWT\TokenGenerator;
 
 /**
  * @internal
@@ -124,6 +125,11 @@ public function isConfigured()
 
     private function createAuthHeader()
     {
+        if (Validators::isVonageKeypair($this->apiKey, $this->apiSecret)) {
+            $tokenGenerator = new TokenGenerator($this->apiKey, file_get_contents($this->apiSecret));
+            return $tokenGenerator->generate();
+        }
+
         $token = array(
             'ist' => 'project',
             'iss' => $this->apiKey,
@@ -131,6 +137,7 @@ private function createAuthHeader()
             'exp' => time() + (5 * 60),
             'jti' => uniqid('', true),
         );
+
         return JWT::encode($token, $this->apiSecret, 'HS256');
     }
 
diff --git a/src/OpenTok/Util/Validators.php b/src/OpenTok/Util/Validators.php
index 6607b45f..2475517a 100755
--- a/src/OpenTok/Util/Validators.php
+++ b/src/OpenTok/Util/Validators.php
@@ -13,6 +13,7 @@
 use OpenTok\Exception\InvalidArgumentException;
 use JohnStevenson\JsonWorks\Document;
 use JohnStevenson\JsonWorks\Utils as JsonUtils;
+use RuntimeException;
 
 /**
 * @internal
@@ -25,13 +26,44 @@ class Validators
 
     public const STREAM_MODES = ['auto', 'manual'];
 
-    public static function validateApiKey($apiKey)
+    public static function isVonageKeypair($apiKey, $apiSecret): bool
     {
-        if (!(is_string($apiKey) || is_int($apiKey))) {
-            throw new InvalidArgumentException(
-                'The apiKey was not a string nor an integer: ' . print_r($apiKey, true)
-            );
+        if (!is_string($apiKey) || !is_string($apiSecret)) {
+            throw new InvalidArgumentException("API Key and API Secret must be strings.");
+        }
+
+        $isOpenTokKey = preg_match('/^\d+$/', $apiKey);
+        $isOpenTokSecret = preg_match('/^[a-f0-9]{40}$/i', $apiSecret);
+
+        if ($isOpenTokKey && $isOpenTokSecret) {
+            return false;
         }
+
+        $isVonageApplicationId = preg_match('/^[a-f0-9\-]{36}$/i', $apiKey);
+        $isVonagePrivateKey = self::isValidPrivateKey($apiSecret);
+
+        if ($isVonageApplicationId && $isVonagePrivateKey) {
+            return true;
+        }
+
+        // Mixed formats or invalid formats - throw an exception
+        throw new InvalidArgumentException("Invalid Vonage Keypair credentials provided.");
+    }
+
+    private static function isValidPrivateKey(string $filePath): bool
+    {
+        if (!file_exists($filePath) || !is_readable($filePath)) {
+            throw new InvalidArgumentException("Private key file does not exist or is not readable.");
+        }
+
+        $keyContents = file_get_contents($filePath);
+
+        if ($keyContents === false) {
+            throw new RuntimeException("Failed to read private key file.");
+        }
+
+        // Check if it contains a valid private RSA key header
+        return (bool) preg_match('/^-----BEGIN PRIVATE KEY-----[\s\S]+-----END PRIVATE KEY-----$/m', trim($keyContents));
     }
 
     public static function validateForceMuteAllOptions(array $options)
@@ -56,13 +88,6 @@ public static function validateForceMuteAllOptions(array $options)
         }
     }
 
-    public static function validateApiSecret($apiSecret)
-    {
-        if (!(is_string($apiSecret))) {
-            throw new InvalidArgumentException('The apiSecret was not a string: ' . print_r($apiSecret, true));
-        }
-    }
-
     public static function validateApiUrl($apiUrl)
     {
         if (!(is_string($apiUrl) && filter_var($apiUrl, FILTER_VALIDATE_URL))) {
diff --git a/tests/OpenTokTest/ArchiveTest.php b/tests/OpenTokTest/ArchiveTest.php
index 7747bf1b..78a33c32 100644
--- a/tests/OpenTokTest/ArchiveTest.php
+++ b/tests/OpenTokTest/ArchiveTest.php
@@ -62,7 +62,7 @@ public function setupArchives($streamMode)
     private function setupOTWithMocks($mocks)
     {
         $this->API_KEY = defined('API_KEY') ? API_KEY : '12345678';
-        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : '0123456789abcdef0123456789abcdef0123456789';
+        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
 
         if (is_array($mocks)) {
             $responses = TestHelpers::mocksToResponses($mocks, self::$mockBasePath);
diff --git a/tests/OpenTokTest/BroadcastTest.php b/tests/OpenTokTest/BroadcastTest.php
index 72f8abea..85afc410 100644
--- a/tests/OpenTokTest/BroadcastTest.php
+++ b/tests/OpenTokTest/BroadcastTest.php
@@ -69,7 +69,7 @@ public function setupBroadcasts($streamMode)
     private function setupOTWithMocks($mocks)
     {
         $this->API_KEY = defined('API_KEY') ? API_KEY : '12345678';
-        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : '0123456789abcdef0123456789abcdef0123456789';
+        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
 
         if (is_array($mocks)) {
             $responses = TestHelpers::mocksToResponses($mocks, self::$mockBasePath);
@@ -98,39 +98,6 @@ private function setupOTWithMocks($mocks)
         $handlerStack->push($history);
     }
 
-    public function testCannotCreateBroadcastWithAddInvalidApiKey(): void
-    {
-        $this->expectException(InvalidArgumentException::class);
-        $this->expectExceptionMessage('The apiKey was not a string nor an integer: ');
-
-        $broadcastObject = new Broadcast($this->broadcastData, [
-            'apiKey' => new Client()
-        ]);
-    }
-
-    public function testCannotCreateBroadcastWithInvalidApiSecret(): void
-    {
-        $this->expectException(InvalidArgumentException::class);
-        $this->expectExceptionMessage('The apiSecret was not a string: OpenTok\Util\Client Object');
-
-        $broadcastObject = new Broadcast($this->broadcastData, [
-            'apiKey' => 'test',
-            'apiSecret' => new Client()
-        ]);
-    }
-
-    public function testCannotCreateBroadcastWithInvalidApiUrl(): void
-    {
-        $this->expectException(InvalidArgumentException::class);
-        $this->expectExceptionMessage('The optional apiUrl was not a string: ');
-
-        $broadcastObject = new Broadcast($this->broadcastData, [
-            'apiKey' => 'validKey',
-            'apiSecret' => 'validSecret',
-            'apiUrl' => 'test'
-        ]);
-    }
-
     private function setupOT()
     {
         return $this->setupOTWithMocks([]);
diff --git a/tests/OpenTokTest/OpenTokTest.php b/tests/OpenTokTest/OpenTokTest.php
index 996f8c9b..d451b97e 100644
--- a/tests/OpenTokTest/OpenTokTest.php
+++ b/tests/OpenTokTest/OpenTokTest.php
@@ -5,7 +5,9 @@
 use Firebase\JWT\JWT;
 use Firebase\JWT\Key;
 use Lcobucci\JWT\Configuration;
-use Lcobucci\JWT\Token\Plain;
+use Lcobucci\JWT\Signer\Hmac\Sha256;
+use Lcobucci\JWT\Signer\Key\InMemory;
+use Lcobucci\JWT\Token;
 use OpenTok\Render;
 use OpenTok\Role;
 use OpenTok\Layout;
@@ -19,6 +21,7 @@
 use OpenTok\Util\Client;
 use GuzzleHttp\Middleware;
 use GuzzleHttp\HandlerStack;
+use OpenTok\Util\Validators;
 use PHPUnit\Framework\TestCase;
 use GuzzleHttp\Handler\MockHandler;
 use OpenTok\Exception\InvalidArgumentException;
@@ -46,10 +49,10 @@ public static function setUpBeforeClass(): void
         self::$mockBasePath = __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . 'mock' . DIRECTORY_SEPARATOR;
     }
 
-    private function setupOTWithMocks($mocks, $customAgent = false): void
+    private function setupOTWithMocks($mocks, $customAgent = false, $vonageVideo = false): void
     {
         $this->API_KEY = defined('API_KEY') ? API_KEY : '12345678';
-        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : '0123456789abcdef0123456789abcdef0123456789';
+        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
 
         if (is_array($mocks)) {
             $responses = TestHelpers::mocksToResponses($mocks, self::$mockBasePath);
@@ -67,11 +70,19 @@ private function setupOTWithMocks($mocks, $customAgent = false): void
             $clientOptions = array_merge($clientOptions, $customAgent);
         }
 
+        $apiUrl = 'https://api.opentok.com';
+
+        if ($vonageVideo === true) {
+            $apiUrl = 'https://video.vonage.com';
+            $this->API_KEY = '1ab38a10-ed9d-4e2b-8b14-95e52d76a13c';
+            $this->API_SECRET = __DIR__ . '/test.key';
+        }
+
         $this->client = new Client();
         $this->client->configure(
             $this->API_KEY,
             $this->API_SECRET,
-            'https://api.opentok.com',
+            $apiUrl,
             $clientOptions
         );
 
@@ -133,6 +144,48 @@ public function testCanStartRender(): void
         $this->assertEquals('started', $render->status);
     }
 
+    public function testCanUseVonageAuth(): void
+    {
+        $this->setupOTWithMocks([[
+            'code' => 200,
+            'headers' => [
+                'Content-Type' => 'application/json'
+            ],
+            'path' => 'v2/project/APIKEY/render/render_start'
+        ]], null, true);
+
+        $render = $this->opentok->startRender(
+            '2_MX4xMDBfjE0Mzc2NzY1NDgwMTJ-TjMzfn4',
+            'e2343f23456g34709d2443a234',
+            'https://webapp.customer.com',
+            2900,
+            '1280x720',
+            'https://sendcallbacks.to.me',
+            [
+                'name' => 'Composed stream for live event'
+            ]
+        );
+
+        $this->assertInstanceOf(Render::class, $render);
+        $this->assertEquals('2_MX4xMDBfjE0Mzc2NzY1NDgwMTJ-TjMzfn4', $render->sessionId);
+        $this->assertEquals('started', $render->status);
+
+        $request = $this->historyContainer[0]['request'];
+        $authString = $request->getHeaderLine('X-OPENTOK-AUTH');
+
+        $privateKey = file_get_contents($this->API_SECRET);
+
+        $config = Configuration::forAsymmetricSigner(
+            new Sha256(),
+            InMemory::plainText($privateKey), // Use private key for decoding
+            InMemory::plainText($privateKey)  // Use private key for verification
+        );
+
+        $token = $config->parser()->parse($authString);
+        $this->assertInstanceOf(Token::class, $token);
+        $this->assertEquals($this->API_KEY, $token->claims()->get('application_id'));
+    }
+
     public function testCanGetRender(): void
     {
         $this->setupOTWithMocks([[
@@ -582,7 +635,7 @@ public function testGeneratesToken(): void
         // This sessionId is a fixture designed by using a known but bogus apiKey and apiSecret
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
         // Act
@@ -613,7 +666,7 @@ public function testGeneratesTokenWithRole(): void
         // This sessionId is a fixture designed by using a known but bogus apiKey and apiSecret
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
         // Act
@@ -643,7 +696,7 @@ public function testGeneratesTokenWithExpireTime(): void
         // This sessionId is a fixture designed by using a known but bogus apiKey and apiSecret
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
         // Act
@@ -674,7 +727,7 @@ public function testGeneratesTokenWithData(): void
         // This sessionId is a fixture designed by using a known but bogus apiKey and apiSecret
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
         // Act
@@ -708,7 +761,7 @@ public function testGeneratesTokenWithInitialLayoutClassList(): void
         // This sessionId is a fixture designed by using a known but bogus apiKey and apiSecret
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
         $initialLayouClassList = array('focus', 'main');
@@ -746,7 +799,7 @@ public function testFailsWhenGeneratingTokenUsingInvalidRole(): void
 
     public function testWillCreateLegacyT1WhenRequested(): void
     {
-        $openTok = new OpenTok('12345678', '0123456789abcdef0123456789abcdef0123456789');
+        $openTok = new OpenTok('12345678', 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f');
         $token = $openTok->generateToken('1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI', [], true);
 
         $this->assertEquals('T1', substr($token, 0, 2));
@@ -754,7 +807,7 @@ public function testWillCreateLegacyT1WhenRequested(): void
 
     public function testWillCreateLegacyT1DirectlyToBypassExpBug(): void
     {
-        $openTok = new OpenTok('12345678', '0123456789abcdef0123456789abcdef0123456789');
+        $openTok = new OpenTok('12345678', 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f');
         $token = $openTok->generateToken('1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI', [], true);
 
         $this->assertEquals('T1', substr($token, 0, 2));
@@ -762,12 +815,12 @@ public function testWillCreateLegacyT1DirectlyToBypassExpBug(): void
 
     public function testWillGenerateSha256Token(): void
     {
-        $openTok = new OpenTok('12345678', '0123456789abcdef0123456789abcdef0123456789');
+        $openTok = new OpenTok('12345678', 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f');
         $token = $openTok->generateToken('1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI');
 
         $this->assertNotEquals('T1', substr($token, 0, 2));
 
-        $decoded = JWT::decode($token, new Key('0123456789abcdef0123456789abcdef0123456789', 'HS256'));
+        $decoded = JWT::decode($token, new Key('b60d0b2568f3ea9731bd9d3f71be263ce19f802f', 'HS256'));
         $decodedArray = (array) $decoded;
 
         $this->assertEquals('12345678', $decodedArray['iss']);
@@ -1308,7 +1361,7 @@ public function testGetsArchiveWithMaxBitrate(): void
 
         $request = $this->historyContainer[0]['request'];
         $this->assertEquals('GET', strtoupper($request->getMethod()));
-        $this->assertEquals('/v2/project/'.$this->API_KEY.'/archive/'.$archiveId, $request->getUri()->getPath());
+        $this->assertEquals('/v2/project/' . $this->API_KEY . '/archive/' . $archiveId, $request->getUri()->getPath());
         $this->assertEquals('api.opentok.com', $request->getUri()->getHost());
         $this->assertEquals('https', $request->getUri()->getScheme());
 
@@ -1425,7 +1478,7 @@ public function testListsArchivesWithSessionId(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
         // Act
@@ -2332,7 +2385,7 @@ public function testSipCall(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $bogusToken = 'T1==TEST';
         $bogusSipUri = 'sip:john@doe.com';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
@@ -2357,7 +2410,7 @@ public function testSipCallWithAuth(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $bogusToken = 'T1==TEST';
         $bogusSipUri = 'sip:john@doe.com';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
@@ -2395,7 +2448,7 @@ public function testFailedSipCall(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $bogusToken = 'T1==TEST';
         $bogusSipUri = 'sip:john@doe.com';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
@@ -2629,7 +2682,7 @@ public function testSignalData(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
 
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
@@ -2666,7 +2719,7 @@ public function testSignalWithConnectionId(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $connectionId = 'da9cb410-e29b-4c2d-ab9e-fe65bf83fcaf';
         $payload = array(
             'type' => 'rest',
@@ -2705,7 +2758,7 @@ public function testSignalWithEmptyPayload(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $payload = array();
 
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
@@ -2727,7 +2780,7 @@ public function testSignalConnectionException(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $connectionId = 'da9cb410-e29b-4c2d-ab9e-fe65bf83fcaf';
         $payload = array(
             'type' => 'rest',
@@ -2750,7 +2803,7 @@ public function testSignalUnexpectedValueException(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $connectionId = 'da9cb410-e29b-4c2d-ab9e-fe65bf83fcaf';
         $payload = array(
             'type' => 'rest',
@@ -2778,7 +2831,7 @@ public function testListStreams(): void
 
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
 
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
 
@@ -2904,7 +2957,7 @@ public function testDefaultTimeoutDefaultsToNull(): void
      */
     public function testDefaultTimeoutCanBeOverriden(): void
     {
-        $opentok = new OpenTok('1234', 'abd', ['timeout' => 400]);
+        $opentok = new OpenTok('4349501', 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f', ['timeout' => 400]);
 
         $opentokReflection = new \ReflectionClass($opentok);
         $opentokClient = $opentokReflection->getProperty('client');
@@ -2927,7 +2980,7 @@ public function testDefaultTimeoutErrorsIfNotNumeric(): void
     {
         $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('Default Timeout must be a number greater than zero');
-        new OpenTok('1234', 'abd', ['timeout' => 'bob']);
+        new OpenTok('4349501', 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f', ['timeout' => 'bob']);
     }
 
     /**
@@ -2937,7 +2990,7 @@ public function testDefaultTimeoutErrorsIfLessThanZero(): void
     {
         $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('Default Timeout must be a number greater than zero');
-        new OpenTok('1234', 'abd', ['timeout' => -1]);
+        new OpenTok('4349501', 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f', ['timeout' => -1]);
     }
 
     public function testCanStartCaptions(): void
diff --git a/tests/OpenTokTest/SessionTest.php b/tests/OpenTokTest/SessionTest.php
index ac12a69b..c98fa8d6 100644
--- a/tests/OpenTokTest/SessionTest.php
+++ b/tests/OpenTokTest/SessionTest.php
@@ -24,7 +24,7 @@ public static function setUpBeforeClass(): void
     public function setUp(): void
     {
         $this->API_KEY = defined('API_KEY') ? API_KEY : '12345678';
-        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : '0123456789abcdef0123456789abcdef0123456789';
+        $this->API_SECRET = defined('API_SECRET') ? API_SECRET : 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $this->opentok = new OpenTok($this->API_KEY, $this->API_SECRET);
     }
 
@@ -152,7 +152,7 @@ public function testGeneratesToken()
     {
         $sessionId = '1_MX4xMjM0NTY3OH4-VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI';
         $bogusApiKey = '12345678';
-        $bogusApiSecret = '0123456789abcdef0123456789abcdef0123456789';
+        $bogusApiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
         $opentok = new OpenTok($bogusApiKey, $bogusApiSecret);
         $session = new Session($opentok, $sessionId);
 
@@ -173,6 +173,4 @@ public function testGeneratesToken()
         $this->assertNotEmpty($decodedToken['sig']);
         $this->assertEquals(hash_hmac('sha1', $decodedToken['dataString'], $bogusApiSecret), $decodedToken['sig']);
     }
-
-}
-
+}
\ No newline at end of file
diff --git a/tests/OpenTokTest/SipCallTest.php b/tests/OpenTokTest/SipCallTest.php
index 45318a94..2a785756 100644
--- a/tests/OpenTokTest/SipCallTest.php
+++ b/tests/OpenTokTest/SipCallTest.php
@@ -11,14 +11,14 @@ public function testSipCallAttributes(): void
         $sipCallData = [
             'id' => '1_MX4xMjM0NTY3OH4',
             'connectionId' => 'VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI',
-            'streamId' => '0123456789abcdef0123456789abcdef0123456789'
+            'streamId' => 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f'
         ];
 
         $sipCall = new SipCall($sipCallData);
 
         $this->assertEquals('1_MX4xMjM0NTY3OH4', $sipCall->id);
         $this->assertEquals('VGh1IEZlYiAyNyAwNDozODozMSBQU1QgMjAxNH4wLjI0NDgyMjI', $sipCall->connectionId);
-        $this->assertEquals('0123456789abcdef0123456789abcdef0123456789', $sipCall->streamId);
+        $this->assertEquals('b60d0b2568f3ea9731bd9d3f71be263ce19f802f', $sipCall->streamId);
         $this->assertNull($sipCall->observeForceMute);
     }
 }
\ No newline at end of file
diff --git a/tests/OpenTokTest/Validators/ValidatorsTest.php b/tests/OpenTokTest/Validators/ValidatorsTest.php
index c5e73906..488bc572 100644
--- a/tests/OpenTokTest/Validators/ValidatorsTest.php
+++ b/tests/OpenTokTest/Validators/ValidatorsTest.php
@@ -9,39 +9,34 @@
 
 class ValidatorsTest extends TestCase
 {
-    public function testWillValidateStringApiKey(): void
+    public function testIsVonageKeypair(): void
     {
-        $this->expectNotToPerformAssertions();
-        $apiKey = '47347801';
-        Validators::validateApiKey($apiKey);
+        $apiKey = '1ab38a10-ed9d-4e2b-8b14-95e52d76a13c';
+        $apiSecret = __DIR__ . '/../test.key';
+        $this->assertTrue(Validators::isVonageKeypair($apiKey, $apiSecret));
     }
 
-    public function testWillValidateIntegerApiKey(): void
+    public function testIsNotVonageKeypair(): void
     {
-        $this->expectNotToPerformAssertions();
-        $apiKey = 47347801;
-        Validators::validateApiKey($apiKey);
+        $apiKey = '4349501';
+        $apiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
+        $this->assertFalse(Validators::isVonageKeypair($apiKey, $apiSecret));
     }
 
-    public function testWillInvalidateApiKey(): void
+    public function testVonageKeypairFailsWithOnlyAppId(): void
     {
         $this->expectException(InvalidArgumentException::class);
-        $apiKey = [47347801];
-        Validators::validateApiKey($apiKey);
-    }
-
-    public function testWillValidateApiSecret(): void
-    {
-        $this->expectNotToPerformAssertions();
-        $secret = 'cdff574f0b071230be098e279d16931116c43fcf';
-        Validators::validateApiSecret($secret);
+        $apiKey = '1ab38a10-ed9d-4e2b-8b14-95e52d76a13c';
+        $apiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
+        Validators::isVonageKeypair($apiKey, $apiSecret);
     }
 
-    public function testWillInvalidateApiSecret(): void
+    public function testVonageKeypairFailsWithOnlyPrivateKey(): void
     {
         $this->expectException(InvalidArgumentException::class);
-        $secret = 3252556;
-        Validators::validateApiSecret($secret);
+        $apiKey = '1ab38a10-ed9d-4e2b-8b14-95e52d76a13c';
+        $apiSecret = 'b60d0b2568f3ea9731bd9d3f71be263ce19f802f';
+        Validators::isVonageKeypair($apiKey, $apiSecret);
     }
 
     public function testWillValidateApiUrl(): void
diff --git a/tests/OpenTokTest/test.key b/tests/OpenTokTest/test.key
new file mode 100644
index 00000000..cc62733d
--- /dev/null
+++ b/tests/OpenTokTest/test.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----