AEAD

AEAD :

Authenticated Encryption with Additional Data

Authenticated Encryption with Associated Data (AEAD) is a cryptographic technique that combines encryption and authentication in a single operation. It ensures that data is both confidential (by encrypting it) and authentic (by verifying its integrity). AEAD allows for the inclusion of additional data (associated data) that is not encrypted but must remain unchanged for the decryption to be valid. This method is particularly useful in scenarios where both the confidentiality of the data and the authenticity of the message are crucial, such as in secure communications and data storage.

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AEAD provides authenticity of data, and confidentiality is optional. It allows for the use of additional data to be sent together with encrypted data without having to encrypt it. The additional plaintext data and encrypted data are all authenticated together: if any part of either changes then it will result in an invalid tag. This is useful in many contexts, like in a packet header for example. [...] https://ez.analog.com/ez-blogs/b/engineerzone-spotlight/posts/authenticated-encryption