[SFTP] Add more crypto algorithm considerations

Mention algorithms we currently don't plan to support (subject to change). Mention RSA min key length of 2048 bits.

Author: mikewill4

articles/storage/blobs/secure-file-transfer-protocol-support.md

@@ -110,13 +110,18 @@ You can use many different SFTP clients to securely connect and then transfer fi
 
 | Host key | Key exchange | Ciphers/encryption | Integrity/MAC | Public key |
 |----------|--------------|--------------------|---------------|------------|
-| rsa-sha2-256 | ecdh-sha2-nistp384 | [email protected] | hmac-sha2-256 | ssh-rsa |
-| rsa-sha2-512 | ecdh-sha2-nistp256 | [email protected] | hmac-sha2-512 | ecdsa-sha2-nistp256 |
+| rsa-sha2-256 <sup>1</sup> | ecdh-sha2-nistp384 | [email protected] | hmac-sha2-256 | ssh-rsa <sup>1</sup> |
+| rsa-sha2-512 <sup>1</sup> | ecdh-sha2-nistp256 | [email protected] | hmac-sha2-512 | ecdsa-sha2-nistp256 |
 | ecdsa-sha2-nistp256 | diffie-hellman-group14-sha256 | aes128-cbc| [email protected] | ecdsa-sha2-nistp384 |
 | ecdsa-sha2-nistp384| diffie-hellman-group16-sha512 | aes256-cbc | [email protected] | 
 ||| aes192-cbc ||
 
-SFTP support for Azure Blob Storage currently limits its cryptographic algorithm support based on security considerations. We strongly recommend that customers utilize Microsoft Security Development Lifecycle (SDL) approved algorithms to securely access their data. More details can be found [here](/security/sdl/cryptographic-recommendations).
+<sup>1</sup>    Requires minimum key length of 2048 bits.
+
+SFTP support for Azure Blob Storage currently limits its cryptographic algorithm support based on security considerations. We strongly recommend that customers utilize [Microsoft Security Development Lifecycle (SDL) approved algorithms](/security/sdl/cryptographic-recommendations) to securely access their data.
+
+> [!IMPORTANT]
+> Algorithm support is subject to change in the future. At this time, we do not plan on supporting the following: `ssh-dss`, `diffie-hellman-group14-sha1`, `diffie-hellman-group1-sha1`, `hmac-sha1`, `hmac-sha1-96`.
 
 ### Known supported clients