All Questions
Tagged with protocol-analysis diffie-hellman
7 questions
5
votes
1
answer
2k
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Why does the SSH protocol generate two keys: an encryption key for client to server communication and server to client communication?
As described in the SSH RFC an initial IV to server, initial IV to client, encryption key client to server, encryption key server to client, integrity key client to server, and an integrity key server ...
- 73
3
votes
2
answers
542
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Tamarin-prover Issue on a Basic Diffie-Hellman Exchange
I am starting Tamarin prover, and it is hard to understand.
Here is a basic example of my issue:
First Code :
...
- 31
2
votes
0
answers
1k
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How to reconstruct the static private key of a Diffie Hellman client, when I can freely choose A, g and p?
I am struggling with a Diffie Hellman crypto challenge based on a client that uses a static private key. My goal is to trick the client into revealing enough information to reconstruct the private key ...
- 121
0
votes
2
answers
302
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Random Oracle to prove an Authenticated DH protocol
I am trying to understand how they use the random oracle to solve the CDH. For example, in the security proof on page 7 of the following paper; A Lightweight Message Authentication Scheme for Smart ...
- 327
2
votes
1
answer
1k
views
Showing formally that DDH hardness implies CDH hardness
As part of homework problem, I need to show that DDH hardness implies CDH hardness.
Assume $CDH$ is hard relative to some group generator.
The intuition is pretty clear, so I've made the trivial ...
- 325
2
votes
1
answer
1k
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Proving security of TLS handshake with ProVerif
Background
For my dissertation I am working on an application protocol for which I require a TLS session. I am looking to achieve Perfect Forward Secrecy, which means I have selected ephemeral Diffie-...
- 141
3
votes
1
answer
267
views
In HMQV, can one use multiple identities with one public key?
The HMQV protocol has 2 "identity" fields $\hat{A}, \hat{B}$ that are used in the dual signature - and it tries to guarantee that any properly-generated session key is only shared by a single $(A, B, \...
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