olemus
pangaautomaadis talletatav krüptovõti, millega krüpteeritakse seal talletatav [PIN-võti(/term/11419), MAC-võti ja hostile saadetavad võtmed
= a cryptographic key used in secure payment systems to encrypt and protect sensitive information (e.g., debit card data) during transactions

ülevaateid
https://www.larksuite.com/en_us/topics/cybersecurity-glossary/terminal-master-key

https://www.vpnunlimited.com/help/cybersecurity/terminal-master-key

http://netzts.in/retail-payments-domain/hsm-lmk-zmk-tmk-pvk-cvk/#:~:text=A%20Terminal%20Master%20Key%20(TMK,or%20POS%20terminal%20or%20similar.