I am looking for the methods in CommonCrypto to generate the shared secret based on ECDH (Elliptic curve Diffie–Hellman). I can find proprietary implementations like this one https://github.com/sur...

I read a lot of posts saying that in java 8 it is possible to expand the DH key size to 2048. They say it is possible from the system property by changing the value of: jdk.tls.ephemeralDHKeySize t...

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...

After watching a YouTube video on the Diffie-Hellman Key Exchange, I wanted to try an implementation in JavaScript (Atwood's law). I sketched up an cipher on Node.js with the following rules: St...

We have a Java Socket Server listening on an SSLSocket (port 443) and an iOS application that connects with it. When running on iOS 5.1, the application stopped working when we upgraded the Java ve...

I'm having doubts about the mechanics of a man in the middle attack during a Diffie–Hellman key exchange. I have heard that it can happen during the key agreement communication. But in the presence...

I am writing a test harness in java for an existing program. As part of this i need to generate a Diffie Hellman key pair and pass the public key to the other program in its raw (i.e unencoded byte...

I am trying to implement DHE_DSS into go's crypto/tls package. Unfortunately I can not seem to get the PreMasterSecret (Z) to be the same, my basic workflow is: Receive Server Key Exchange Message ...

Does Diffie-Hellman (DH) provide perfect forward secrecy? or is it a feature for Ephemeral Diffie-Hellman (DHE) only ? Is Elliptic Curve Ephemeral diffie-Hellman (ECDHE) is better than DHE ?

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 fro...

Having searched, I've found myself confused by the use of P and G in the Diffie Hellman algorithm. There is requirementy that P is prime, and G is a primitive root of P. I understand the security...

Does the Elliptic curve diffie hellman calculation look any different from the standard one defined here: /* * The basic Diffie-Hellman Key Agreement Equation * * The client initiates * A =...

Can a Diffie-Hellman key exchange algorithm be used to encrypt client-server communication on a web-page in place of SSL? If it can, what are the disadvantages (i.e. why does the standard use SSL w...

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 do...