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Integrity-aware parallelizable mode (IAPM) is a mode of operation for cryptographic block ciphers. As its name implies, it allows for a parallel mode of operation for higher throughput.
IAPM mode
described in more detail in Hebrew Wikipedia.
Encryption and authentication
At the time of its creation, IAPM was one of the first cipher modes to provide bothauthentication
Authentication (from ''authentikos'', "real, genuine", from αὐθέντης ''authentes'', "author") is the act of proving an Logical assertion, assertion, such as the Digital identity, identity of a computer system user. In contrast with iden ...
and privacy
Privacy (, ) is the ability of an individual or group to seclude themselves or information about themselves, and thereby express themselves selectively.
The domain of privacy partially overlaps with security, which can include the concepts of a ...
in a single pass. (In earlier authenticated encryption designs, two passes would be required to: one to encrypt, and the second to compute a MAC.)
IAPM was proposed for use in IPsec.
Other AEAD schemes also provide all of the single pass, privacy and authentication properties. IAPM has mostly been supplanted by Galois/counter mode.
See also
*OCB mode
Offset codebook mode (OCB mode) is an authenticated encryption mode of operation for cryptographic block ciphers. OCB mode was designed by Phillip Rogaway, who credits Mihir Bellare, John Black, and Ted Krovetz with assistance and comments o ...
IAPM mode
described in more detail in Hebrew Wikipedia.
References
{{Cryptography navbox , block , hash Block cipher modes of operation Authenticated-encryption schemes