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Aug
28
comment How does Random Oracle and Standard Model differ?
What research have you done? There is lots written on this subject, both in textbooks and in Wikipedia, as well as on this site (try clicking on the random-oracle-model tag under your question to see other questions). I expect you to do a significant amount of research before asking, and to show us in your question what research you've done, and to use the research to frame a narrower question. There is little point in us repeating the information that is already widely available on the Internet. It looks like you haven't done that, so your question isn't a good fit for this site.
Aug
27
comment Is hashing a list of hashes safe?
This is helpful, but it doesn't actually list the bottom-line answer: does this increase the risk of collision? I think the bottom-line answer is no, it's safe -- and it might help to add that to your answer.
Aug
27
comment RSA was rejected by which journal?
What research have you done? Where did you hear this? Are you thinking of Merkle's puzzles?
Aug
24
comment Efficiently map $2^n$ unique 64-bit vectors to $2^n$ $n$-bit vectors where $n < 64$?
How are you going to represent the set of $2^n$ unique 64-bit vectors? What does that set look like? The answer is going to depend upon these details. Depending upon what your set of $2^n$ 64-bit vectors looks like, the answer might be very different. Therefore, we can't answer the question until you edit your question to give us that sort of information; I'm voting to close as "too broad". You can fix the question by editing it. (Also, I suggest you edit it to tell us what you tried and what research you've done on your own. You did do significant research before asking, right?)
Aug
24
comment How does compression before encryption leak info about the input?
"I'm pretty sure adding an "evil" chunk to a JPEG image won't leak the "good" part." - I don't know how you could possibly know that. Anyway, I believe my answer answers that question that was asked.
Aug
20
reviewed Approve suggested edit on S-box with differential uniformity = 2
Aug
19
accepted Why is TLS susceptible to protocol downgrade attacks?
Aug
19
comment Simple proof that shows AES is not a uniform permutation on any n-bit string?
@Gilles, assuming the author means that it is uniformly distributed on the set of all permutations (when the key is randomly chosen)... the other thread proves that AES does not have this property. Of course, Dimitry's answer is an excellent answer, too.
Aug
19
comment Simple proof that shows AES is not a uniform permutation on any n-bit string?
possible duplicate of Block cipher and parity of permutation
Aug
15
comment Are there any cryptographic flaws in my webhook signing process?
@JessieA.Morris, for what it's worth, there are multiple different ways one can do TLS with client certs; they don't all require having a single trusted CA. But I've said my piece.
Aug
15
comment Are there any cryptographic flaws in my webhook signing process?
@JessieA.Morris, you're still creating your own mini-protocol. My advice stands. P.S. I'm not certain you mean by "work". Your statement that client-side certs introduce more work doesn't sound right to me. If you mean development cost, I don't agree. If you mean computation time, then I suggest you benchmark it, but I bet you'll find that TLS client certs are no worse than anything else that involves a client-side signature. Either way, if TLS+client certs doesn't meet your needs, you should clarify the question by being more precise about requirements.
Aug
15
answered Are there any cryptographic flaws in my webhook signing process?
Aug
15
reviewed Leave Open $(k, n)$ threshold secret sharing to $(k+k', n + n')$ without reissuing all shares
Aug
15
reviewed Close I am new to Cryptography and I wonder if one can Suggest me Beginner Projects
Aug
15
comment Are there any cryptographic flaws in my webhook signing process?
Is there a reason you aren't just using client certificates? They were designed for solving this problem. The TLS folks thought a lot about the security challenges, so you wouldn't have to.
Aug
4
answered Secure MultiParty Computation with secret inputs for secret outputs
Aug
4
awarded  Yearling
Aug
2
comment run length testing
This question looks off-topic to me. The site is for questions about cryptography (see here); your question does not appear to fit the fall within the scope of the site.
Aug
2
comment Theoretical attack on RSA
What's your question, specifically? This is not the place for open-ended questions ("Please leave opinions on that") -- this is for specific, answerable questions. In any case, this is a duplicate of the other question that Ricky Demer identifies.
Jul
31
comment Questions on FHE over the Integers - the question modified!
@JongHyunKim, please don't use comments to ask a new question. Comments should only be used to help the author of the answer improve their answer. (This is not a discussion forum; see the faq for more details on how to use this site.)