noun
cryptographic system; cryptosystem
Technical computing term for a system that provides encryption, decryption, or other cryptographic functions.
この暗号システムは、量子コンピュータでも解読が難しいとされている。
This cryptographic system is said to be difficult to break even with a quantum computer.
暗号 means 'cipher' or 'code' in general, while 暗号システム specifically refers to the entire system or framework for encryption.
Compound of 暗号 (cipher, code) and システム (system), a straightforward modern technical term.