Added readme

Author: Utngy Pisal

README.md

@@ -1,3 +1,49 @@
 # HybridCrypto
 
-A description of this package.
+HybridCrypto is simple implementation of hybrid cryptography following recommendations by  [OWASP](https://mobile-security.gitbook.io/mobile-security-testing-guide/general-mobile-app-testing-guide/0x04g-testing-cryptography).
+
+## Usage
+
+> Step 1: Add this package to our Swift project via Swift Package Manager (SPM)
+```java
+https://github.com/UTNGYPisal/SwiftHybridCrypto
+
+```
+> Step 2: Import package to classes you need to work with encryption
+```swift
+import HybridCrypto
+```
+
+> Step 3: Initialize HybridCrypto in your AppDelegate
+```swift
+let publicKeyPlain = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvTtZxoq7IKTwRkADtWix\n" +
+"Ryv/CHKK+skNlMMV5G+om75HgHUo8AOzHnj9yUvhcm8Maz46ukxiZsvDPgExu9N1\n" +
+"agEm9HHJEZg1VN+2dT+JojODuC3qkF7o94duchQX44gPjyIBEE/113E6fS51SGGm\n" +
+"WYrCapSYjNRubB97O1WPm/2nK+A/m9KTtCuIZMp4i/qe4mXCLMRepFO2ORBLD5Ac\n" +
+"RU+/tF15IruvaBhZezY+IX571yRao3ZLlVBJtZKU7SHp5udxQ0daRxtsVc9aloC3\n" +
+"TRRL8RvFjHyg7V+uSHkg6cN4IIMrTnkwVkn+7BE9KrT7tY8yEkSE8W4WVCDChIRf\n" +
+"FwIDAQAB"
+HybridCrypto.initialize(with: Configuration.defaultCofig, publicKeyPlain: publicKeyPlain)
+```
+> Step 4 (Final): Use it wherever you want
+```swift
+do {
+    let result = try HybridCrypto.shared.encrypt(message: "Hello")
+    print(result.httpParams)
+} catch  let err {
+    print("Error: \(err)")
+}
+```
+
+## Result
+Once encryption is successful, you'll get a Http-friendly result object
+```swift
+public struct HttpFriendlyResult : Codable {
+    let requestPassword: String
+    let iv: String
+    let salt: String
+    let responsePassword: String
+    let encryptedData: String
+    let signature: String
+}
+```