diffie-hellman

I am experiencing a problem with Diffie Hellman implementation. I am using this code http://www.java2s.com/Tutorial/Java/0490__Security/DiffieHellmanKeyAgreement.htm It is actually an example from one book I am reading. But I can't understand why generateSecret() creates a different key for every KeyAgreement . I have noticed the function creates different keys even if I call it with the same KeyAgreement twice! If someone has something to suggest I will be really glad! Thanks for your time! MK. I think the part of the example private static BigInteger g512 = new BigInteger("1234567890", 16);

I have the line of code below to generate a private key: int Xa = randomNo.nextInt(10000); int Ya = (int) Math.pow(G, Xa) % P; G and P are static numbers. Whereas Xa is randomly generated. Every time I run the program, it gives me the same result for Ya . Is this correct for Diffie-Hellman? I thought the private key had to be changed every time the algorithm was run. I think the problem may be that you are overflowing double with your exponentiation, resulting in infinity, resulting in the same value every time (unless you are lucky enough to end up with a very low number returned for your

迪菲-赫尔曼 密钥交换算法 p,g 通信双方已知，p是质数，0< g <p Alice: 取一随机数a(私钥), 算 A=g^a mod p, 发给 Bob Bob: 取一随机数b, 算 B=g^b mod p, 发给 Alice 然后两边算共享密钥： Alice: S1 = B^a mod p Bob: S2 = A^b mod p 数学上可证明： S1 = S2 来源： https://www.cnblogs.com/bear129/p/11811349.html

OK-- thanks to Mike , I was able to get Wincrypt to generate a Diffie-Hellman keypair. I figured out out to export the public key, and how to import the other party's public key. According to the docs, upon import of the other party's public key, the shared secret has been computed. Great. I now need to get ahold of that shared secret, but I don't think its possible. Simply calling CryptExportKey with a type of PLAINTEXTKEYBLOB fails unless I call CryptSetKeyParam to change the algorithm id from CALG_AGREEDKEY_ANY to something... else. But I don't want something else, I want the shared secret.

I'm attempting to implement Diffie-Hellman key exchange. I am a little confused with how to use the secret key once generated. As seen in the output, the 2 secret keys are generated using the same prime & base as normal in the key exchange, and trade public keys when generating the secret keys, however they are not outputting the same value as I expected. I'm getting very confused with how to implement this encryption method and would be very grateful for some direction. My overall aim for this is to implement an encrypted SMS Android application. (The screenshot was unable to capture the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm trying to ssh from Jenkins to a local server but the following error is thrown: [ SSH ] Exception : Algorithm negotiation fail com . jcraft . jsch . JSchException : Algorithm negotiation fail at com . jcraft . jsch . Session . receive_kexinit ( Session . java : 520 ) at com . jcraft . jsch . Session . connect ( Session . java : 286 ) at com . jcraft . jsch . Session . connect ( Session . java : 150 ) at org . jvnet . hudson . plugins . SSHSite . createSession ( SSHSite . java : 141 ) at org . jvnet . hudson . plugins . SSHSite

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I know this has been asked a few times but I have tried many of the accepted solutions already given. I am creating a simple SSH tunnel using JSch. and I keep getting this error along with this in the logs: INFO: diffie-hellman-group14-sha1 is not available. I have already added the Java unlimited policy files to the correct folder and I have added this algorithm to the KexAlgorithms section in the sshd_config file. Below is the full log breakdown. INFO: Connecting to xx.xx.xxx.xxx port 22 INFO: Connection established INFO: Remote version