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Security and Crypto Technologist


Dec
12
comment What is the difference between PPE and SPPE?
@e-sushi can u give me pointer to luby-rackoff construction of SPRP you are talking about ?
Nov
22
comment Authentication of machine before installation (to stop piracy)
@supra , its difficult to see the connection , but let me explain , the moment you copy the software its beyond your hands you cant prevent from any one doing anything withit especially if its running it . the prevention might come from preventing copying the file itself which is impossible. Most of the licensing software fail here even if you tie the installation with MAC address too, there is nothing one could do it can be spoofed easily
Nov
21
comment Authentication of machine before installation (to stop piracy)
@e-sushi does not matter it boils down to the same
Nov
21
comment Authentication of machine before installation (to stop piracy)
"Trying to make digital files uncopyable is like trying to make water not wet" Bruce Schneier !
Nov
16
comment How practical is proxy re-encryption for AES?
i wanted practical ones its ok if they are obvious ;)
Nov
16
comment Is it possible to actually verify a “sponge function” security claim?
good job in providing your learnings and details
Nov
13
comment How should we interpret the cryptanalysis results of SIMON and SPECK?
Oh ok , what about SIMON ? or in general what to look for when interpreting cryptanalysis results
Nov
12
comment How does secret sharing solve the partial exposure problem?
can u be more clear on , what is share revealing ? partial key exposure problem ? AFAIK , there is no random value addition
Nov
9
comment Is there a relation between security of rounds of DES and Luby Rackoff rounds?
@RichieFrame any good references on what other properties are required by block cipher apart from CPA ?
Nov
9
comment Why is it important to generate a pseudorandom permutation from a pseudorandom function?
@D.W. Yeah you put it right way ! my misconception is cleared now , by reading about LR and its derivatives work i some how got to believe this is the only way . But inorder to build small domain ciphers i dont see much work building the AES way, although AES is used as PRF
Nov
8
comment Why is it important to generate a pseudorandom permutation from a pseudorandom function?
Is it necessary that a PRP can be constructed always from a PRF ?
Oct
15
comment Is there way to combine secrets first and later split them?
@rath, i dont have public values in my system
Oct
15
comment Is there way to combine secrets first and later split them?
@Reid yeah makes sense now . i did not view it from compression angle .
Oct
15
comment Is there way to combine secrets first and later split them?
@Reid the resultant combined string length should be less than string length of combined strings concatenated plainly.
Oct
15
comment Is there way to combine secrets first and later split them?
added additional details , basically i want to pack two strings first and later i may split them into their original forms
Oct
9
comment what are the uses of tweaks in block ciphers?
@CodesInChaos i did not get the use of blockid as tweak ? how does it help in disk encryption ?
Oct
9
comment what are the uses of tweaks in block ciphers?
thanks i checked that question before posting , it did not have the answer for my question
Sep
10
comment General-purpose non-interactive multi-party computation protocol
Interesting but this is one the case. but not generalized SMC, you would find secret sharing scheme to be heart of SMC in most protocols , refer martin giesler's mpc thesis .
Sep
10
comment General-purpose non-interactive multi-party computation protocol
give me reference. without a dealer how is the secret shared ? ideally , each party gets results from others and collates itself if it requests the function evaluation
Sep
10
comment General-purpose non-interactive multi-party computation protocol
yes clients get the partial results via secure channels