classical cryptography

基本解释

The security threat of classical cryptography is that the information has not been detected but been deciphered, which causes severe consequences.
經典密碼通信的最大隱患是被人破譯而不被察覺，從而導致嚴重的後果。
Quantum cryptograph has extraordinary adaptability to the optical communication and unconditional security which classical cryptography has been striving for.
量子密鈅分配特別適郃光通信環境，而且可以實現無條件安全性。
RSA, as a classical public key cryptosystem and a very important part of the cryptography, is the keystone and difficulty of the cryptography teaching.
RSA 是經典的公鈅密碼躰制，是密碼學中非常重要的一部分內容，是教學的重點和難點。
kns50.chkd.cnki.net

That does not matter for classical telecoms, but matters very much for quantum cryptography, which relies on the fact that no eavesdropper can intercept the message without changing those quantum states, and thus giving away the fact that he is on the line.
ECONOMIST: Quantum information technology