Secure Text Transfer Using Diffie Hellman Key Exchange

$\begingroup$ @user3407319 The point of my answer was that whether or not RSA is used for key exchange or for used for data directly depends on the use case. In the case of TLS, if RSA is used, it is as part of the key exchange, and not for the bulk of the data. Diffie-Hellman Key Exchange. Problem: We have a symmetric encryption scheme and Diffie-Hellman key exchange calculator - Irongeek This will be a simplified version of the Diffie-Hellman key exchange (in real life, better constants and larger variables should be chosen) , in the form of a game. Enter as many times as you like. Fixed numbers: g=10, p=541 Contestant steps: 1. Find someone you do not know, and introduce yourself. 2. One of you is Alice (a), and one is Bob (b). Diffie Hellman Key Exchange Algorithm | Uses and Advantages Diffie Hellman key exchange Algorithms is developed by Whitefield Diffie and Martin Hellman in 1976 to overcome the problem of key agreement and exchange. It enables the two parties who want to communicate with each other to agree on symmetric key, key can be used for encrypting and decryption, note that Diffie Hellman key exchange algorithm Cryptography Academy - The Diffie-Hellman key exchange The Diffie-Hellman key exchange algorithm solves the following problem: Alice and Bob wants to share a secret key for e.g. a symmetric key algorithm such as DES or AES, but they can only communicate through an insecure channel that is eavesdropped by their adversary Eve. I.e. all messages sent between Alice and Bob are observed by Eve.

## Ephemeral Diffie-Hellman vs static Diffie-Hellman. Ephemeral Diffie-Hellman (DHE in the context of TLS) differs from the static Diffie-Hellman (DH) in the way that static Diffie-Hellman key exchanges always use the same Diffie-Hellman private keys. So, each time the same parties do a DH key exchange, they end up with the same shared secret.

The Diffie-Hellman key exchange protocol works in the following way. For the first party, we'll run the group generation algorithm to generate parameters g, q, and g. Again cyclic group g of prime order q with generator g. It then choses a uniform exponent, x, and computes the group element, H1 equal to g to the x, and it sends those parameters How do I setup a Diffie-Hellman key on NetScaler? Diffie-Hellman, also known as D-H is named after Whitfield Diffie and Martin Hellman, who proposed this public key exchange scheme in 1976. Diffie-Hellman key exchange is a method for sharing secret between two entities who have no prior knowledge of each other, which can be used for encrypted communication in order to exchange sensitive information in a public channel.

### The Diffie-Hellman key exchange algorithm solves the following problem: Alice and Bob wants to share a secret key for e.g. a symmetric key algorithm such as DES or AES, but they can only communicate through an insecure channel that is eavesdropped by their adversary Eve. I.e. all messages sent between Alice and Bob are observed by Eve.

The number of bytes of key material generated is dependent on the key derivation function; for example, SHA-256 will generate 256 bits of key material, whereas SHA-512 will generate 512 bits of key material. The basic flow of an ECDH key exchange is as follows: Alice and Bob create a key pair to use for the Diffie-Hellman key exchange operation Secure Text Transfer Using Diffie Hellman Key Exchange