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key length

   Also found in: Wikipedia 0.04 sec.

The number of bits available for the longest keys in a cryptographic implementation. For example, the key length of a particular Diffie-Hellman/DSS PGP key can be anywhere from 1024 bits to 4096 bits. See key space and key fingerprint.


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The more complex the key, the harder it is to break the encryption; so AES with a 256-bit key length renders the algorithm unbreakable.
The difficulty of cracking an encrypted message is a function of the key length.
0 ensures that all significant cryptographic parameters - symmetric key length, asymmetric key length, digital signature algorithms - are of equivalent strength, as recommended in NIST guidelines.
 
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