DES Keys


Can anyone give me a good reason that DES/3DES keys must have odd parity, I can’t see a reason for it myself. It might still be a strong cypher if it weren’t for the loss of 8 bits per key confused

I guess some implementations don’t check for and strip the parity bits, but in that case they become a DES variant, and in FIPS compliant environments that’s not an option anyway.

The simplest answer is probably “because thats the way is was designed”, still there must be a reason

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Phil Harding

SharePoint Consultant, Developer, Father, Husband and Climber.

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