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The KCV is the "Key Check Value" for the key, calculated by assuming the key/components are 3DES keys, and encrypting a string of binary zeroes. The KCV is the first six hex digits of the resulting ciphertext. Combining components into keys: |
3 component parts:
- Start with the Key1 (using the ANSI standard key for this example):0123456789ABCDEFFEDCBA9876543210
- create 2 random number of the same length (16 bytes in this example): 988A59D7273186B8C9C9922B6D40BA75 and 8936E5269ADFABE7D4829B2EFB3BF5D9 (the random numbers will become Component1 and Component2)
- XOR the 3 numbers. i.e. XOR Key1, Component1 and Component2 together: XOR(0123456789ABCDEFFEDCBA9876543210, 988A59D7273186B8C9C9922B6D40BA75, 8936E5269ADFABE7D4829B2EFB3BF5D9) = 109FF9963445E0B0E397B39DE02F7DBC (the result will be key Component3)
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