RFC 8645

Re-keying Mechanisms for Symmetric Keys, August 2019

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Status:
INFORMATIONAL
Author:
S. Smyshlyaev, Ed.
Stream:
IRTF

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC8645

Discuss this RFC: Send questions or comments to cfrg@irtf.org

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Abstract

A certain maximum amount of data can be safely encrypted when encryption is performed under a single key. This amount is called the "key lifetime". This specification describes a variety of methods for increasing the lifetime of symmetric keys. It provides two types of re-keying mechanisms based on hash functions and block ciphers that can be used with modes of operations such as CTR, GCM, CBC, CFB, and OMAC.

This document is a product of the Crypto Forum Research Group (CFRG) in the IRTF.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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