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Jun
12
comment Deriving 2 shared secrets from one private key and 2 different public keys
what does it mean by "derive 2 shared secrets , $d*Q_1$ ..." ? . Also looks like some text book problem ?
Jun
9
reviewed Approve Why initialize SHA1 with specific buffer?
Jun
8
revised Practical implementations of Multiparty computations
added 28 characters in body
May
29
answered security in format preserving encryption
May
19
comment garbled circuit vs fully homomorphic encryption
In GC , are there really two separate steps to calculate garbled circuit and garbled input ? i believe they are done in one step ?
May
18
comment How to securely store data? / How to securely encrypt a file?
first , what is a keyfile ? is it a general file with cryptographic keys ? then why dont we just call it keys ?
May
18
comment What is the difference between online and offline brute force attacks?
Simplest explanation is , you got a dump of /etc/password file to try all possible passwords at machine in your basement (offline). The other being you keep trying bunch of default/popular passwords at the command prompt of the server (online) until u succeed
May
18
comment How to securely store data? / How to securely encrypt a file?
Ok. Also it is not clear the XORING of key files ?
May
17
comment How to securely store data? / How to securely encrypt a file?
Doing your own custom crypto is usually not so good advice . schneier.com/blog/archives/2015/05/amateurs_produc.html
May
17
comment How to securely store data? / How to securely encrypt a file?
"implement ur own PBKDF ?" or "HMAC" , not sure if its good idea ? definitely not
May
15
reviewed Approve Does the plaintext have to be at least as long as the key in Polyalphabetic substituion cipher
May
15
awarded  Popular Question
May
13
comment where should private and public keys be stored?
TPM's are the place to store secrets.
May
7
comment Defining format-preserving encryption for natural language
@fgrieu it is interesting to see this from steganography perspective. i did not thought that way before !
May
7
revised Defining format-preserving encryption for natural language
added 161 characters in body
May
7
comment Defining format-preserving encryption for natural language
good point , now lets define a "natural language" ? and the "formats" to preserve ?
May
6
answered Defining format-preserving encryption for natural language
May
5
comment How difficult is homomorphic encryption?
very subjective and open ended question
May
1
comment What is the difference between various modes in FPE?
depends you need to pick on your requirements. you need greater range of lengths of formats or performance etc.
Apr
26
reviewed Approve If you hashed a hash an infinite number of times would you end up with a unique hash?