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Apr
8
comment Are there any noisy homomorphic encryption schemes?
@RickyDemer sorry i did not get you, can u be more clear ? what is a "just do it" construction ?
Apr
8
revised Are there any noisy homomorphic encryption schemes?
edited title
Apr
8
asked Are there any noisy homomorphic encryption schemes?
Apr
7
comment Why is a Feistel network not a type of substitution-permutation network?
Your question is not clear. A Feistel network could contain an SPN in its $f$ function but that is distinctly different from SPN itself
Apr
6
answered Differential Privacy and appropriate noise distribution
Apr
4
comment Epsilon Differential privacy using Laplace distribution
How did you prove individual mechanisms are preserver DP ? Why do you think you cannot prove the composition does not preserve ? give us more context to help you
Mar
26
comment Can machine learning analyze random number generator?
I have had this question myself from many months, eager to hear some one answering this !
Mar
6
comment Is there a format preserving cryptographically secure hash?
If hash preserves the length of the original string then it is just a permutation (like block cipher). Use a FPE algorithm to encrypt the input and throw the key, consider the ciphertext as your hash !
Feb
5
comment Generating cyclic group for Ciphertext-Policy Attribute-Based Encryption
we have used this charm-crypto.com/Main.html but it is written in python.
Feb
4
reviewed Approve Are there two known strings which have the same MD5 hash value?
Jan
8
comment Encryption for a short packet size
Its based on fiestel networks which is very well studied in theory. the original paper was written some twenty years ago. ofcourse independent cryptanalysis is not yet done by anyone
Jan
6
comment Encryption for a short packet size
github.com/cisco/libfnr will this help ?
Jan
4
reviewed Approve Luby-Rackoff on Feistel ciphers
Jan
4
reviewed Approve Why are there no MACs inspired by block cipher modes other than CBC and CFB?
Jan
3
comment what is it called when encrypt('a') + encrypt('a') == encrypt('aa')?
They are applied in general too. It is called "Partially Homomorphic Encryption" to be precise !
Jan
3
reviewed Approve Post processing of AAD and len A||C in a hardware AES GCM implementation
Jan
2
comment Can we quantify strength of encryption scheme ?
@JohnMeacham that would be too subjective, who qualifies to be schneier ? how would you experimentally verify such units ?
Dec
30
asked Can we quantify strength of encryption scheme ?
Dec
27
revised Protocol composition
additional notes
Dec
4
comment Using machine-learning techniques for data-dependent operations in ciphers
there are plenty , just search for "cryptanalysis genetic algorithms" on scholar.google.com