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I like crypto. Need I say more?


May
2
revised Question about dual system encryption
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May
2
comment Question about dual system encryption
I think it depends on the security game.
May
1
answered in Bilinear pairings, what is the difference between Type 2 and Type 3?
Apr
30
comment How do you test the security of your cipher?
@David天宇Wong Schneier's Law "Anyone, from the most clueless amateur to the best cryptographer, can create an algorithm that he himself can't break." That is why point 2 is so important.
Apr
30
comment How to argue to a paranoid that RSA is safe?
What do they propose as an alternative?
Apr
29
revised ECC public key encryption and authentication - ECIES with ECDSA vs ECDH with AES
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Apr
29
comment ECC public key encryption and authentication - ECIES with ECDSA vs ECDH with AES
Unless this is for fun or homework, the right approach is to use standard protocols/approaches. For example, you could use OpenSSL to establish a secure and authenticated communication channel between two parties (you can even use elliptic curves).
Apr
29
comment ECC public key encryption and authentication - ECIES with ECDSA vs ECDH with AES
How does Alice know that $K_B$ is indeed Bob's and not Bryan's? Is Bob's identity contained in the public key? If so, who certified that Bob is indeed Bob?
Apr
29
comment What cryptographic paradigm is appropriate for this use case?
@owagh, for a good long, term solution. I suggest you post a new question (probably on IT Security as this site is more about the theoretical underpinnings of crypto an not necessarily the day-to-day use, IT security will probably be better for day-to-day use stuff). Give a good, clear, concise description of the attacks you are worried about, and you should get some answers on options to mitigate them. There is no silver bullet for this problem, but some options with different tradeoffs.
Apr
29
answered What cryptographic paradigm is appropriate for this use case?
Apr
29
comment What cryptographic paradigm is appropriate for this use case?
Never do bulk encryption with asymmetric cryptography. Asymmetric cryptography is typically used to encrypt a symmetric key which is used to do bulk encryption.
Apr
28
comment What is the MD5 collision with the smallest input values?
In the end isn't it all ones and zeros. So the two strings on the site you point out could just as easily be two large numbers. What's the difference? As to your point about values that are not factored into the calculation, everything is factored into the calculation. So I'm not sure what you mean there.
Apr
25
comment ECC Complexity order of point addition, scalar point multiplication and selecting random point
@Prasanth where $n$ is? The size of the underlying field?
Apr
25
revised FHE over the Integers - reduction to approximate gcd problem
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Apr
24
comment Pairings in Identity-based encryption vs. Attribute-based encryption
@drlecter thanks for the correction.
Apr
24
comment Pairings in Identity-based encryption vs. Attribute-based encryption
@artjomb the target group is not an elliptic curve group.
Apr
24
revised Pairings in Identity-based encryption vs. Attribute-based encryption
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Apr
24
answered Pairings in Identity-based encryption vs. Attribute-based encryption
Apr
24
revised difference between leveled FHE and normal FHE scheme
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Apr
24
comment difference between leveled FHE and normal FHE scheme
@RickyDemer I believe you are right.