[Cryptography] Key meshing (Re: [Crypto-practicum] Retire all 64-bit block ciphers.)

[Dmitry Belyavsky]

Hello all,

Regarding the discussion of the Sweet32 attack, it's worth mentioning that
there is a specification of so called key meshing for the Russian GOST
cipher (which has 64-bit block as well).
Key meshing is a procedure of a predictable change of the current key after
processing an certain amount of data.
It is described in RFC 4357, Section 2.3 (
https://tools.ietf.org/html/rfc4357#section-2.3).

This key meshing defends against any attack that uses a big portion of data
encrypted with the same key.

May be it is useful to specify the similar procedure for modern ciphers too.

-- 
SY, Dmitry Belyavsky
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