Advanced Encryption Standard (AES) is the standard cryptographic algorithm for U.S. government organizations to protect sensitive or classified information. Advanced Encryption Standard reduces circuit-switched-to-IP call capacity by 25%.

AES is an Avaya proprietary technique and not recommended. Instead, use the following four SRTCP options:

• 10-srtp-aescm256-hmac80

• 11-srtp-aescm256-hmac32

• 1-srtp-aescm128-hmac80

• 2-srtp-aescm128-hmac32

Avaya Encryption Algorithm (AEA) is not as secure an algorithm as Advanced Encryption Standard, but call capacity reduction with Avaya Encryption Algorithm is negligible.

Use this option as an alternative to Advanced Encryption Standard encryption when:

• All endpoints within a network region using this codec set must be encrypted.

• All endpoints communicating between two network regions and administered to use this codec set must be encrypted.

AEA is an Avaya proprietary technique and not recommended. Instead, use the following four SRTCP options:

• 10-srtp-aescm256-hmac80

• 11-srtp-aescm256-hmac32

• 1-srtp-aescm128-hmac80

• 2-srtp-aescm128-hmac32

AEA and AES encryption algorithms are not supported on SIP endpoints, use the following four SRTCP options:

• 10-srtp-aescm256-hmac80

• 11-srtp-aescm256-hmac32

• 1-srtp-aescm128-hmac80

• 2-srtp-aescm128-hmac32

Media stream is unencrypted. This option prevents encryption when using this codec set and is the default setting when Media Encryption is not enabled.