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- In classical cryptography, because of the passive eavesdropping, the absolute security of secure key is impossible. 由于被动窃听的存在，通信双方在传输信道上建立绝对安全的密钥是不可能的。
- Quantum cryptography is the combination between classic cryptography and the principle of quantum mechanics,and its security can be proved. 量子密码学是量子力学原理和经典密码学相结合的产物,具有可证明的安全性。
- Both Bach and Beethoven wrote classical music. 巴赫与贝多芬谱写的都是古典音乐。
- His writings are full of classical allusions. 他的著作里用了很多典故。
- An orchestra usually plays classical music. 管弦乐队通常演奏古典音乐。
- Interest in classic music has revived recently. 近来对古典音乐的兴趣又浓厚起来。
- He fall into rapture over classic music. 他对古典音乐喜爱若狂。
- I prefer classical music to pop music. 我喜欢古典音乐，不太喜欢流行音乐。
- John is very knowledgeable about classical music. 约翰对古典音乐有丰富的知识。
- She prefers pop music and jazz to classical music. 较之古典音乐她更喜欢流行音乐与爵士音乐。
- classical cryptography 经典密码学
- He likes pop; he doesn't care for classic music. 他喜欢流行歌曲，不喜欢古典音乐。
- "War and Peace" is a literary classic. 《战争与和平》是一部经典文学著作。
- She has a taste for classic music. 她喜欢古典音乐。
- The old gentleman had on a classic suit. 那位老年绅士穿著一套古朴的传统服装。
- This novel may well become a classic. 这本小说很可能成为经典著作。
- Is it true that classical music is good for an unborn baby? 古典音乐是不是真的对胎教有好处？
- Digital signatures rely on public key cryptography. 数字签名依赖于公共密钥加密学。
- Of, relating to, or employing cryptography. 密码术的密码术的、与之有关的或使用密码术的
- The study of cryptanalysis or cryptography. 密码学研究密码分析或密码学的学科
