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Mar
18
awarded  Supporter
Mar
6
comment Is MITM possible after key exchange phase done successfully in RSA?
@RickyDemer Can you please elaborate? What is the exact difference?
Mar
6
revised Is MITM possible after key exchange phase done successfully in RSA?
edited tags
Mar
6
awarded  Editor
Mar
6
comment Is MITM possible after key exchange phase done successfully in RSA?
@tylo I have updated the question with protocol
Mar
6
revised Is MITM possible after key exchange phase done successfully in RSA?
Added protocol
Mar
6
asked Is MITM possible after key exchange phase done successfully in RSA?
Feb
22
awarded  Scholar
Feb
22
accepted Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?
Feb
21
comment Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?
Thanks for the scenario. I already deduced that as you can see in my comment to the neverwalkaloner's answer. Is it possible to compromise Bob's side?
Feb
20
comment Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?
@neverwalkaloner yes, you are right. With scenario you explained attack is possible. MITM can send K(nA) to Alice. Alice will decrypt it and will assume that nA is the session key. Hence Alice is totally compromised. However, I cannot think of any scenario where Bob will be compromised. Anyways, thanks for the attack scenario. Can you please edit your original answer with this scenario? I will accept your edited answer.
Feb
19
comment Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?
@neverwalkaloner Well, denial of service is possible here. But I am asking about a normal MITM attack. Can you please give one such scenario.
Feb
19
comment Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?
@figlesquidge Yes, you are right.
Feb
19
comment Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?
@K.G. Pk(...) denotes encryption with key Pk. Please note that figlesquidge has now edited 'Pk' to just 'k' now.
Feb
19
comment Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?
But S is encrypted with pre-shared key k which is known only to Alice and Bob.
Feb
19
awarded  Student
Feb
19
asked Is use of pre-shared key for sharing session key in symmetric key cryptography vulnerable to MITM?