Question

section 10.1 describes a man in the middle attack on the diffie-hellman key exhange protocal in which the adversary generates two public private key pairs for the attack. could the same attack be accomplished with one pair?

Answer 1

1. James will attack by generating a random private key XD and a corresponding public key YD.

2. Jane transmit YA to another person called Alex.

3. James intercept YA and transmit YD to jane.

4. Jane receive YD and calculate K1

At this point james and jane thinks they share a secret key but instead james has a secret key k1 to Jane and k2 to alex.

5. Alex transmit another key XA to alex for example.

6. James intercept and calculate k2 and vice versa.