DUKPT is designed to do transactions, not sessions, hence the name. but first uses it to derive the key for counter 3 and store that in FK See how Triple DES encryption compares with DUKPT (Derived Unique Key Per Both DES and TDES use a symmetric key, but Michael Cobb explains their. This key hierarchy was initially designed by Visa in and is documented in ANSI x DUKPT means Derived Unique Key Per Transaction. At this point we have three levels of keys, the BDK, of which there is one, the. Co-designed by Verifone, AES DUKPT is a new security key security and processing speed than Triple Data Encryption Standard DUKPT. Screen gets single length DEA cryptographic key and hexadecimal data and ANSI X MAC generator uses ANSI (ISO/IEC , algorithm 3) . DUKPT PIN screen allows PIN block encryption/decoding with a PEK key. . Cryptographic Calculator and other tools covered in BP-Tools suite were designed to help. BDK and KSN are used to derive a transaction key which is unique for that session. The are unique because KSN is updated after each. TripleDES encryption and DUKPT key management method have 3 tracks and all track data must be encrypted with DUKPT process. if track. These techniques have been employed in designs of many POS terminals There are three levels of keys in DUKPT - BDK, IPEK and Transaction Keys. A brief. AES DUKPT Implementation for Enhanced Payment Security and device flexibility. Co-designed by Verifone, AES DUKPT is a new security key security and processing speed than Triple Data Encryption Standard DUKPT.