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6h
answered What's the entropy of the output for Tiger Encryption?
6h
comment What's the entropy of the output for Tiger Encryption?
Tiger is a cryptographic message digest, it is not encryption. The resultant digest will have the same entropy as the input key.
1d
comment Are the MD5 constants an S-Box?
Technically the rotation could be viewed as a linear substitution, although in cryptography an s-box is generally a nonlinear substitution.
1d
comment Encrypting a short phrase into two keys. both with length of 32letters
Sounds like you want to take a plaintext, and encrypt it into 2 different ciphertexts that need to be combined somehow to reveal the plaintext, correct?
1d
answered What are the key differences between the draft SHA-3 standard and the Keccak submission?
Apr
21
comment Usage of different size chunks during AES encryption/decryption
In my software chunk size only refers to how much file data is read into memory before encryption, and does not affect the ciphertext or decryption parameters. I guess this would be specific to Mcrypt or to whatever mode it is using
Apr
19
answered How to calculate Modulo using a standard calculator for a one time pad encryption
Apr
18
comment Constants Differ in SHA1 implementation
Same thing with the Y value, it only saves 1 byte of code space
Apr
18
comment RSA algorithm , decrypting a message
His name is Bond, that is actually pretty cute.... and yes that is ASCII encoding
Apr
18
comment Constants Differ in SHA1 implementation
Yes, and it appears to be an optimization to save code space, as there is 1 less constant
Apr
16
reviewed Approve suggested edit on ECDSA Public Key generation
Apr
16
comment SSL-like protocol with public-key hard-coded in the client
hardcode a 2nd revocation key into the client?
Apr
16
comment Does AES-128 have the same strength as AES-256 with a padded key?
We can both agree that 14 rounds is better than 10, but the 256-bit key schedule is weaker. AES-256 with a 128-bit key is weaker than AES-128 extended to 14 rounds, the question is how much weaker. Do related key attacks now apply? Can the subkey alignment allow new attacks? What about non public attacks?
Apr
15
comment Positioning of keys in encrypted text
The name of this technique is obfuscation
Apr
15
comment Does AES-128 have the same strength as AES-256 with a padded key?
And yes, padding that is non 0 has the same problems
Apr
15
answered Does AES-128 have the same strength as AES-256 with a padded key?
Apr
11
comment Difference between plain AES CTR and “CCM-style” CTR
Technically, a correct CTR implementation would have bounds checking for the size of the input block that is not populated by the nonce, or force the nonce to be 96 bits and only increment the remaining uInt32. We all know how many problems incorrect bounds checking can cause...
Apr
10
comment cryptography and use of python programming language
I have never heard this
Apr
9
comment Security of this deterministic encryption scheme
No, but this is a scheme that is more than just the mode; I assume the plaintext MAC is sufficient to authenticate, but it is truncated possibly past a desired security level
Apr
9
comment Security of this deterministic encryption scheme
There is also no MAC on the ciphertext