AEAD

cryptography

Stands for: Authenticated Encryption with Associated Data

A cipher that encrypts and authenticates in one step, so tampering fails as a single operation.

Authenticated Encryption with Associated Data (RFC 5116) combines confidentiality and integrity in one primitive - AES-GCM, AES-CCM, ChaCha20-Poly1305. TLS 1.3 permits AEAD ciphers only, because the older encrypt-then-separately-authenticate constructions kept producing padding-oracle attacks.

Also known as: aead, authenticated encryption

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