Use this command to generate a common base, dhp.pem. The principle, however, is the same.ĭuring this process, we will need to generate 5 elements before deriving a shared secret: OpenSSL can help you perform a Diffie-Hellman key exchange, but it is not directly compatible with this tool. You may use the shared secret to encrypt messages to each other, possibly by using the AES String Encryption and Decryption tool. If done successfully, you two should have an identical shared secret. Once your partner sends you their public key, paste it into their public key box. If Alice’s secret key is 4 and Bob’s secret key is 6, what is the secret key they exchanged?īoth Alice and Bob calculate the value of their public key and exchange with each other.This tool will generate a key pair for you, of which you can send the public key to a partner. In a Diffie-Hellman Key Exchange, Alice and Bob have chosen prime value q = 17 and primitive root = 5. Their D-H key is-īoth the parties calculate the value of their public key and exchange with each other.īoth the parties calculate the value of secret key at their respective side. Party A chooses 2 and party B chooses 5 as their respective secrets. They agree on 7 as the modulus and 3 as the primitive root.

Suppose that two parties A and B wish to set up a common secret key (D-H key) between themselves using the Diffie Hellman key exchange technique. PRACTICE PROBLEMS BASED ON DIFFIE HELLMAN KEY EXCHANGE.

Now, both the parties calculate the value of secret key.įinally, both the parties obtain the same value of secret key.

Both the parties receive public key of each other.

Both the parties calculate the value of their public key and exchange with each other.

Both the parties already know their own private key.After this exchange, both the parties know the value of ‘a’ and ‘n’.‘a’ is the primitive root of prime number ‘n’.One of the parties choose two numbers ‘a’ and ‘n’ and exchange with the other party.Using Diffie Hellman Algorithm, the key is exchanged in the following steps. This algorithm facilitates the exchange of secret key without actually transmitting it.This algorithm is used to exchange the secret key between the sender and the receiver.Attackers might intrude and know the secret key while exchanging it.The major issue is exchanging the secret key between the sender and the receiver.Both sender and receiver use a common secret key to encrypt and decrypt the message.

Diffie hellman calculator