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Apr
16
comment May the problem with DES using OFB mode be generalized for all feistel ciphers
Yes, ive updated the original response.
Apr
16
revised May the problem with DES using OFB mode be generalized for all feistel ciphers
added 117 characters in body
Apr
15
answered May the problem with DES using OFB mode be generalized for all feistel ciphers
Apr
10
comment May the problem with DES using OFB mode be generalized for all feistel ciphers
Sorry for my late reaction. Thank you for answer my question!
Apr
10
accepted May the problem with DES using OFB mode be generalized for all feistel ciphers
Apr
8
revised May the problem with DES using OFB mode be generalized for all feistel ciphers
added 83 characters in body
Apr
8
revised May the problem with DES using OFB mode be generalized for all feistel ciphers
added 295 characters in body
Apr
8
comment May the problem with DES using OFB mode be generalized for all feistel ciphers
Thanks for the response! But with DES, if i encrypt P1 with $k$ i get C1, if i encrypt C1 with $k$ agian, i get back P1? Or only when DES is used with "weak keys"?
Apr
8
comment May the problem with DES using OFB mode be generalized for all feistel ciphers
Thank you for the response! The reverse operation in the feitel network is for OFB a "blackbox". But reversing the subkey is a property of the feistel network, you have to be able to decrypt back? The problem here is using a feistel cipher on OFB-mode and how it "leaks" information.
Apr
8
awarded  Editor
Apr
8
revised May the problem with DES using OFB mode be generalized for all feistel ciphers
added 35 characters in body
Apr
8
comment May the problem with DES using OFB mode be generalized for all feistel ciphers
Yes, very true. Let me fix that.
Apr
8
asked May the problem with DES using OFB mode be generalized for all feistel ciphers
Apr
7
awarded  Scholar
Apr
7
comment PBKDF2 when dkLen and hLen have the same size
Thank you for the quick and clear response!
Apr
7
accepted PBKDF2 when dkLen and hLen have the same size
Apr
7
asked PBKDF2 when dkLen and hLen have the same size
Dec
30
awarded  Autobiographer