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What (who) is partially known plaintext cryptanalysis - definition

CRYPTANALYTIC ATTACK MODEL WHERE THE ATTACKER HAS ACCESS TO BOTH THE PLAINTEXT AND ITS ENCRYPTED VERSION

Known plaintext attack; Known plaintext; Crib (cryptanalysis); Known-plaintext; Known plaintexts; Known plain-text attack; Cryptographic crib

Known-plaintext attack

The known-plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has access to both the plaintext (called a crib), and its encrypted version (ciphertext). These can be used to reveal further secret information such as secret keys and code books.

https://en.wikipedia.org/wiki/Known-plaintext_attack

Plaintext-aware encryption

Plaintext-awareness; Plaintext aware; Plaintext awareness

Plaintext-awareness is a notion of security for public-key encryption. A cryptosystem is plaintext-aware if it is difficult for any efficient algorithm to come up with a valid ciphertext without being aware of the corresponding plaintext.

https://en.wikipedia.org/wiki/Plaintext-aware_encryption

Chosen-plaintext attack

CRYPTANALYTIC ATTACK MODEL IN WHICH THE ATTACKER CAN OBTAIN THE CIPHERTEXTS FOR ARBITRARY PLAINTEXTS

Chosen plaintext; Chosen-text attack; Chosen-plaintext; Adaptive chosen-plaintext attack; Adaptive chosen plaintext attack; Chosen plaintext attack; Chosen plaintexts; Plaintext injection; Known-plaintext injection; Known plaintext injection

A chosen-plaintext attack (CPA) is an attack model for cryptanalysis which presumes that the attacker can obtain the ciphertexts for arbitrary plaintexts.Ross Anderson, Security Engineering: A Guide to Building Dependable Distributed Systems.

https://en.wikipedia.org/wiki/Chosen-plaintext_attack

Wikipedia

Known-plaintext attack

The known-plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has access to both the plaintext (called a crib), and its encrypted version (ciphertext). These can be used to reveal further secret information such as secret keys and code books. The term "crib" originated at Bletchley Park, the British World War II decryption operation, where it was defined as:

A plain language (or code) passage of any length, usually obtained by solving one or more cipher or code messages, and occurring or believed likely to occur in a different cipher or code message, which it may provide a means of solving.

https://en.wikipedia.org/wiki/Known-plaintext attack