Recommendation for Key-Derivation Methods in Key-Establishment Schemes (el. knyga) (skaityta knyga) | knygos.lt

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FINAL Released April 2018

This Recommendation specifies techniques for the derivation of keying material from a shared secret established during a key-establishment scheme defined in NIST SPs 800-56A or 800-56B. The first category consists of a family of one-step key-derivation functions, which derive keying material of a desired length from a shared secret generated during the execution of a key-establishment scheme (and possibly other information as well). The second category consists of an extraction-then-expansion key-derivation procedure, which involves two steps: 1) Randomness extraction, to obtain a single cryptographic key-derivation key from a shared secret generated during the execution of a key-establishment scheme, and 2) Key expansion, to derive keying material of the desired length from that key-derivation key and other information. Since NIST's [SP 800-108] specifies several families of key-derivation functions that are approved for deriving additional keying material from a given cryptographic key-derivation key, those functions are employed in the second (key-expansion) step of these two-step procedures.

In addition to the key-derivation methods whose specifications are provided in this document, [SP 800-135] describes several variants (of both the one-step and two-step methods) that are approved for specific applications.

A full copy of all the pertinent cybersecurity standards is available on DVD-ROM in the CyberSecurity Standards Library disc which is available at Amazon.com.

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