1）作为通讯的双方A和B，都有一个共同信赖的第三方CA，由CA为每个人生成公钥和相应的私钥并分发给A、B。



（2）A和B分别将自己的公钥提供给对方，然后A用B的公钥加密一个数据X（整型，可自己定义，比如100）并发送给B，B用自己的私钥解密后得到数据X，然后按协商好的函数F（比如F(X)=2*X）计算得到F(X)，再利用A的公钥加密后发送给A；A在本地用自己的私钥解密后得到F(x)，在同本地计算得到的F(X)进行对比，如果一致，说明公钥分配成功。



（3）A用B的公钥对一图象文件（test_pig.bmp)进行加密并发送给B，B收到后解密，对比原图象看是否一致，并记录整个加密/解密的所用时间T1；

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1) as the communication between the parties A and B, have a common trusted third party CA, the CA public key generated for each person and the corresponding private key and distributed to A, B.



(2) A and B, respectively, their own public key available to the other, then A with B s public key to encrypt a data X (integer, can define their own, such as 100) and sent to B, B with their own private key to decrypt data obtained after X, then press the agreed-function F (eg F (X) = 2* X) calculated from F (X), then use a s public key encrypted and sent to a　A locally with their own private key decrypted to get F (x), in the same local calculated F (X) for comparison, if the same, indicating the success of public-key distribution.



(3) A with B s public key for an image file (test_pig.bmp) is encrypted and sent to B, B to decrypt the receipt, compared to the original image to see if the same, and record the entire encryption/decryption time T1 used