1, the use of public key cryptographic techniques to achieve symmetric cryptography key distribution 2, using the symmetric key by the distribution of the content of communication encryption/decryption

code
....\CreateKeyPair.java
....\Node_a_1.java
....\Node_a_2.java
....\Node_b_1.java
....\Node_b_2.java
....\实验报告.doc

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