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- Authenticated_encryption abstract "Authenticated Encryption (AE) is a block cipher mode of operation which simultaneously provides confidentiality, integrity, and authenticity assurances on the data; decryption is combined in single step with integrity validation. These attributes are provided under a single, easy to use programming interface.The need for AE emerged from the observation that securely combining a confidentiality mode with an authentication mode could be error prone and difficult. This was confirmed by a number of practical attacks introduced into production protocols and applications by incorrect implementation, or lack of, authentication (including SSL/TLS).Six different authenticated encryption modes (namely OCB 2.0, Key Wrap, CCM, EAX, Encrypt-then-MAC (EtM), and GCM) have been standardized in ISO/IEC 19772:2009. More were developed in response to NIST solicitation. Sponge functions can be used in duplex mode to provide authenticated encryption.A typical programming interface for AE mode implementation would provide the following functions: Encryption Input: plaintext, key, and optionally a header in plaintext that will not be encrypted, but will be covered by authenticity protection. Output: ciphertext and authentication tag (Message Authentication Code). Decryption Input: ciphertext, key, authentication tag, and optionally a header. Output: plaintext, or an error if the authentication tag does not match the supplied ciphertext or header.The header part is intended to provide authenticity and integrity protection for networking or storage metadata for which confidentiality is unnecessary, but authenticity is desired.In addition to protecting message integrity and confidentiality, authenticated encryption can provide plaintext awareness and security against chosen ciphertext attack. In these attacks, an adversary attempts to gain an advantage against a cryptosystem (e.g., information about the secret decryption key) by submitting carefully chosen ciphertexts to some "decryption oracle" and analyzing the decrypted results. Authenticated encryption schemes can recognize improperly-constructed ciphertexts and refuse to decrypt them. This in turn prevents the attacker from requesting the decryption of any ciphertext unless he generated it correctly using the encryption algorithm, which would imply that he already knows the plaintext. Implemented correctly, this removes the usefulness of the decryption oracle, by preventing an attacker from gaining useful information that he does not already possess.Many specialized authenticated encryption modes have been developed for use with symmetric block ciphers. However, authenticated encryption can be generically constructed by combining an encryption scheme and a Message Authentication Code (MAC), provided that: The encryption scheme is semantically secure under a chosen plaintext attack. The MAC function is unforgeable under a chosen message attack.Bellare and Namprempre (2000) analyzed three compositions of these primitives, and demonstrated that encrypting a message and subsequently applying a MAC to the ciphertext implies security against an adaptive chosen ciphertext attack, provided that both functions meet the required properties.In 2013, a competition was announced to encourage design of authenticated encryption modes.".
- Authenticated_encryption wikiPageExternalLink modes_development.html.
- Authenticated_encryption wikiPageID "2244296".
- Authenticated_encryption wikiPageRevisionID "603961284".
- Authenticated_encryption hasPhotoCollection Authenticated_encryption.
- Authenticated_encryption subject Category:Symmetric-key_cryptography.
- Authenticated_encryption comment "Authenticated Encryption (AE) is a block cipher mode of operation which simultaneously provides confidentiality, integrity, and authenticity assurances on the data; decryption is combined in single step with integrity validation. These attributes are provided under a single, easy to use programming interface.The need for AE emerged from the observation that securely combining a confidentiality mode with an authentication mode could be error prone and difficult.".
- Authenticated_encryption label "Authenticated encryption".
- Authenticated_encryption label "認証付き暗号".
- Authenticated_encryption sameAs 認証付き暗号.
- Authenticated_encryption sameAs m.06ysjk.
- Authenticated_encryption sameAs Q15263584.
- Authenticated_encryption sameAs Q15263584.
- Authenticated_encryption wasDerivedFrom Authenticated_encryption?oldid=603961284.
- Authenticated_encryption isPrimaryTopicOf Authenticated_encryption.