Re-keying Mechanisms for Symmetric Keys
RFC 8645, “Re-keying Mechanisms for Symmetric Keys”, is an Informational document published in August 2019 by S. Smyshlyaev. The canonical text is published by the RFC Editor.
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.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
The canonical text of RFC 8645 is hosted at rfc-editor.org. Available in TXT,HTML.
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