Key Check Value (KCV) Generator
Generate and verify Key Check Values (KCVs) for cryptographic keys. KCVs are used to verify the integrity of keys without exposing the actual key material.
Example: 0123456789ABCDEF
About Key Check Values
A Key Check Value (KCV) is a short value derived from a cryptographic key that allows verification of key integrity without revealing the key itself.
Common methods for generating KCVs include:
- Zeros Method: Encrypt a block of zeros with the key and use the first few bytes of the result.
- CMAC Method: Calculate a CMAC of a specific value using the key and use the first few bytes.
- Hash Method: Apply a hash function to the key and use the first few bytes of the hash.
KCVs are commonly used in key management systems, HSMs, and payment applications to verify that the correct key is being used without exposing sensitive key material.
EMV Decoder tools perform all calculations client-side for maximum security.
No sensitive data is ever transmitted to our servers.