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Cryptography is about communication in the presence of adversaries.
密码学是关于在存在对手的情况下进行通信的。
Meaning comes from belonging to and serving something beyond yourself.
The modern state is a product of the European experience.
Hard work, under the old system, meant long hours, little rest, and poor pay. Under the new system, it means a fair day's work for a fair day's pay.