KCV Calculator

What it calculates

Produces a short fingerprint for comparing symmetric keys.

Inputs and methods

HEX keys of 8, 16, 24 or 32 bytes; the selected KCV method determines accepted sizes.

Worked example

Select DES and enter test key 0123456789ABCDEFFEDCBA9876543210.

KCV: 08D7B4

Specification and limits

Eight named methods are available. Equal KCVs do not guarantee equal keys; DES, VISA and ATALLA share the stated zero-block convention.