Overview#RFC 5116 defines algorithms for Authenticated Encryption with Associated Data (AEAD) , and defines a uniform interface and a registry for such algorithms.
Authenticated Encryption with Associated Data, or AEAD , adds the ability to check the integrity and authenticity of some Associated Data (AD), also called "additional authenticated data", that is not encrypted.
Why use "Associated Data"#As a very general rule, the purpose of Associated Data (hereafter "AD") is to bind a ciphertext to the context where the it is supposed to appear, so that attempts to "cut-and-paste" a valid ciphertext into a different context can be detected and rejected.]
More Information#There might be more information for this subject on one of the following:
- [#1] - Authenticated encryption: Relations among notions and analysis of the generic composition paradigm - based on information obtained 2016-02-16
- [#2] - Authenticated-Encryption with Associated-Data - based on information obtained 2016-02-16
- [#2] - What is the purpose of associated authenticated data in AEAD? - based on information obtained 2018-02-08-