TERM

ciphertext auto-key

"Cryptographic logic that uses previous cipher text to generate a key stream." [C4009, A1523] (See: KAK.)

Updated

Jan 06, 2026

Also known as

CTAK

Senses

(D)

"Cryptographic logic that uses previous cipher text to generate a key stream." [C4009, A1523] (See: KAK.) Deprecated Term: IDOCs SHOULD NOT use this term; it is neither well known nor precisely defined. Instead, use terms associated with modes that are defined in standards, such as CBC, CFB, and OFB.

"Cryptographic logic that uses previous cipher text to generate a key stream." [C4009, A1523] (See: KAK.)

Deprecated Term: IDOCs SHOULD NOT use this term; it is neither well-known nor precisely defined. Instead, use terms associated with modes that are defined in standards, such as CBC, CFB, and OFB.

IETF RFC 4949 (Internet Security Glossary)

Bibliography

IETF RFC 4949 (Internet Security Glossary)
Accessed Jan 06, 2026Quoted
RFC 4949 — Internet Security Glossary (Version 2)
https://www.rfc-editor.org/rfc/rfc4949.txt
RFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.
Source: IETF RFC 4949 (rfc-editor.org).