TERM

initialization value

An input parameter that sets the starting state of a cryptographic algorithm or mode. (Compare: activation data.)

Updated

Jan 06, 2026

Also known as

IV

Senses

(I) /cryptography/

An input parameter that sets the starting state of a cryptographic algorithm or mode. (Compare: activation data.) Tutorial: An IV can be used to synchronize one cryptographic process with another; e.g., CBC, CFB, and OFB use IVs. An IV also can be used to introduce cryptographic variance (see: salt) besides that provided by a key.

An input parameter that sets the starting state of a cryptographic algorithm or mode. (Compare: activation data.)

Tutorial: An IV can be used to synchronize one cryptographic process with another; e.g., CBC, CFB, and OFB use IVs. An IV also can be used to introduce cryptographic variance (see: salt) besides that provided by a key.

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).