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For whether specific types of questions are allowed on this site or not.

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1answer
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Should we generally require hardware-related questions to specify specs?

I've just stumbled over one of our hardware-related Q&As again and it reminded me of something that always itches me when it comes to missing hardware specs. For examle, How fast a middle-class ...
5
votes
1answer
103 views

Do we want bitcoin/cryptocurrency related questions? A cryptocurrency tag?

This question is inspired by this recent comment. My first thought in response to this was to create a cryptocurrency tag. However, we have been receiving a lot of questions here about bitcoin/...
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1answer
22 views

Is it OK to ask an unanswered question again, but written better?

I am new to this forum, so still feeling out the rules. I have asked a question and I fear I have added too much detail, where the actual question has got lost (this was pointed out to me in the ...
8
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1answer
108 views

How can we modify our close reason and help center texts to allow “some” coding questions?

We recently had the following question: Timing vulnerability of byte array equality test? quote: Would the following code to test MAC equality leak timing information ? ...
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1answer
134 views

Can crypto.SE help with implementing a secure protocol?

Having lurked here for a while, I have a problem understanding how crypto.SE can help someone in the real world, other than academically. I've learnt a lot about aspects of cryptography and some of ...
8
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3answers
182 views

(When) are reference requests actually on-topic here?

I recently realized that we have some contradictory documentation on our site (and, probably, contradictory beliefs and opinions among users) about the topicality of questions asking for off-site ...
2
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3answers
73 views

Do we want to allow questions asking for random test vectors?

I recently stumbled upon a question asking for the calculation of a random test vector: An example of CCM - AES Mode need to test if my AES CCM mode works correctly, but I don't find any ...
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0answers
28 views

Is it appropriate to post algorithm designs here for review and comment? [duplicate]

Is it appropriate to post a design of an algorithm to be reviewed and commented on if I provide enough information about it (drawings, technical details)?
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3answers
121 views

Suggestion for policy of banning questions

I am writing this with my own banned question in mind. As a suggestion for ban policy: When a mod decides to ban certain questions which are related to the field or expertise of your site but for ...
5
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0answers
48 views

Is asking for help with new proofs on-topic?

Is it appropriate and on-topic to ask for help with provable security? For example, would it be reasonable to ask for technical assistance in applying the Leftover Hash Lemma to show that a sum is ...
12
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3answers
228 views

How to deal with ransomware questions?

We have specific questions asking about breaking ransomware for CryptoLocker, CryptoWall, and now *.[MKKitana@india.com].wallet (which may be a variant of some other ransomware. All of these have a ...
3
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1answer
39 views

Are questions like “Is X covered by patents?” on-topic?

It looks like we don't have the clarification whether or not we want to allow (and if yes with which scope / restrictions) patent questions. So the question is: Do we want questions of the type "Is X ...
7
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1answer
89 views

Is it OK to ask whether a cryptographic function exist?

Is it on-topic to ask whether a given cryptographic function I’m describing in my question already exists (and how such a process would be called)?
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4answers
119 views

Are [crc] questions on-topic here, and should they be?

Thanks to a recent question, I realized that we have a crc tag, with 17 questions and the following tag wiki excerpt (quoted verbatim): The Cyclic Redundant Check is non-cryptographic error-...
2
votes
1answer
45 views

Do questions on whether a hash function is almost universal belong here or on math.SE?

Do questions on whether a hash function is almost universal belong here or on math.SE? They seem to belong both places: on math.SE because the question is about mathematics, and here because ...
2
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0answers
53 views

Canonical resources on “Identify this cipher” questions

There have been a number of questions along the lines of "what cipher was used to encrypt this data", and they have all been (rightly) closed as off-topic (as discussed here). I think it's correct to ...
3
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1answer
105 views

Should we add a close reason for requests for cryptanalysis of amateur schemes?

There are a bunch of questions asking to evaluate the security of an amateur cipher, clearly without knowing pretty basic stuff on cryptography or how SE works. You all know the type of question I'm ...
2
votes
1answer
35 views

What is the best way to deal with repeated off topic questions?

Earlier this week, a request of decryption of a text encrypted with an unknown classical cipher was posted on Crypto.SE. I flagged the question as off-topic but recognized the encryption as Vigenère ...
4
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3answers
134 views

What is considered to be off-topic?

I'm new to this site. When I posted my first question here, I tried to follow the advice on the Tour site: My question was directly related to cryptography, and it was neither "opinion-based", nor ...
3
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4answers
115 views

Should the linked question really be treated as a “request to analyze…”

So, we have this question, which currently has 4 close votes. All 4 are votes for "Requests for analyzing or deciphering a block of data are off-topic here, as the results are rarely useful to anyone ...
1
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0answers
50 views

Can I submit an encrypted message to see if its breakable here? [duplicate]

For some reason I have been thinking a lot about encryption lately. I'm a CS major, but an encryption novice. The skeptic in me feels making a code that uses a fairly simple algorithm would be a lot ...
3
votes
1answer
54 views

Should we allow PKI related questions?

If I take a look at our Tour this crypto site is for questions about: Asymmetric and symmetric cryptographic algorithms Cryptographic protocols and cryptanalysis techniques Hashing Entropy and ...
4
votes
1answer
64 views

Can I ask a Proof Of Work related question on crypto.SE?

I am not sure how far the concept of Proof Of Work qualifies to be on topic with crypto.SE which is why I would like to ask recommenations here first. The question is related to me not understanding ...
5
votes
1answer
103 views

Are questions about identifying encryption algorithms allowed?

I have an encryption algorithm I pulled out of a binary. I'd like to identify what the algorithm is, but I don't have the requisite crypto experience. The code is "high level" C# code, as opposed to ...
6
votes
1answer
92 views

The help center indiscriminately describes “random number generation” as on-topic

From the help center page “What topics can I ask about here?”: Random number generation. Yet, on a recent question: This question is squarely off-topic on crypto.SE because it is about a ...
4
votes
1answer
81 views

Is it OK to ask for program/software recommendations here?

Is it within scope of this site to ask about recommendations for crypto software, or is this site reserved for more abstract discussions about crypto algorithms or their implementation? For example: ...
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4answers
954 views

Coursera removal request

Update 2: This post is about this edit to this question Recently there was a suggested-edit asking for removal of one of the many "how to do cryptanalysis on a 1 time pad if used twice" questions? ...
2
votes
1answer
89 views

Are career questions on-topic for this site?

Are questions about preparing for a career in cryptography generally on-topic on this site? This came up in response to the following question https://crypto.stackexchange.com/q/12681/351, but I ...
2
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2answers
48 views

Are technical questions about programs on-topic?

I would like to understand a bit how Aescrypt works. Since I only know little about cryptography and programming, I wanted to ask a question about how the files are created by Aescrypt? For example, ...
3
votes
1answer
73 views

Would a question regarding a specific crypto library be on topic @ crypto.SE?

For example, would a question asking what the Blowfish structure BLOWFISH_CTX or the variables xl and ...
7
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1answer
160 views

Is code review in scope?

Is reviewing the cryptographic aspects of a block of code on-topic for this site? Example: Am I insecurely implementing AES in Python?
4
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2answers
163 views

Should we disallow questions on schemes which do not follow Kerckhoffs's principle?

Firstly, I apologise for the short body of the question. This is somewhat related to allowing amateur ciphers on the site but also relates to questions such as this one. Questions on such schemes ...
0
votes
1answer
78 views

How much science fiction should be handled here “in theory”?

Frequently, I stumble upon questions that are purely hypothetical and assume a specific technical base which does not yet exist. What I mean are questions going somewhat like this: "…let's assume that ...
5
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2answers
230 views

What to do with the Snowden questions?

I am specifically referring to the Snowden question follow-up here. People have voiced concern over this type of question in comments, and there have been suggestions of taking this to Meta. This ...
6
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1answer
99 views

Is describing a technology used in cryptography (Smart Card) on-topic?

I recently jumped on making a rather long answer to this question: What is a Smart Card?, without asking myself: is it on-topic? Also, my answer contains a lengthy historic/introductory part, with ...
5
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2answers
118 views

What sort of “cryptosystem verification” would be on-topic/allowed here?

I'm considering posting a design of a proof-of-work system here and asking a few questions about it, but in the FAQ, it specifically states that you do not want questions about "cryptanalysis of a ...
4
votes
1answer
158 views

Are legal issues surrounding cryptography on topic here?

This question titled "Hash Digest Legal Status" was recently asked and closed as off topic. Since I couldn't actually find anything in the FAQ explicitly disallowing such questions, nor any past meta ...
3
votes
2answers
176 views

Are questions about steganography on topic here?

With the recent proposal for a Steganography stack exchange over on Area 51, I would be interested to know if Steganography questions are on-topic here on Cryptography. I suggested that they might in ...
4
votes
1answer
81 views

Are existence questions on topic?

I've been going through some of the unanswered questions and I've seen a few that are very difficult to answer. They go something like this: I want to do X. Does there exist a tool/protocol/...
6
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2answers
162 views

Implementation List Questions

It seems we have had a few questions recently asking for references on implementations. For example: Are there any Implementations of Secure Indexes? How to implement order preserving encryption or ...
5
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1answer
66 views

are history of cryptography questions allowed?

I want to make some questions regarding the history of cryptography. particularly I want material/information about WWII german code breakers. Is this the site to ask the question or should I ask in ...
10
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2answers
518 views

Should we allow questions about amateur ciphers?

Our FAQ currently says: Do we accept questions asking for cryptanalysis of your cipher (hash function, ...) design? No, we do not. If you want peer review of your full cryptographic scheme, ...
6
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1answer
144 views

Is it OK to ask for cryptanalysis of a cipher which was still widely deployed a few years ago?

I'm wondering if the following question would be on topic and ethical: How would the stream cipher GOC be cryptanalyzed with modern techniques? The GOC (Générateur d'Octets Chiffrants) is a stream ...
10
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2answers
961 views

Do we want “challenge”/analyse-this questions and if so what constraints, if any, should we put on them?

So earlier I decided to close this question based on several factors. I chose too localised, because I don't think such a question really benefits anyone as it stands. This raised the question in my ...
10
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4answers
719 views

Asking homework questions

Is it desirable for people to ask a homework question here? Set aside for now the question of how this would be enforced. I'm more interesting in the policy question, and in our goals. Is this ...
5
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1answer
139 views

Help us define our scope by writing the FAQ?

As you probably know, all stackexchange sites have a FAQ. What you might not know is that the community can edit part of it through their moderators. Specifically, we can edit this bit: What kind ...
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4answers
153 views

Is this area just about “modern” cryptography?

Cryptography is a very old subject in History and while many people concentrate on the Computer Age cryptosystems, quite a few people can be interested in older cryptosystems like oldish ...
4
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3answers
101 views

Is this the place to ask about crypto-algorithm creation/new techniques?

For almost 7 years I've been working in algorithm creation for new encryption systems. I'll be the first to tell you that my goals are lofty and that it's no small task to make something worth using. ...
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3answers
99 views

Are “How to use cryptography-program X” on topic?

This example https://crypto.stackexchange.com/questions/90/how-can-i-add-my-picture-to-my-public-key-using-gnupg got already 3 off-topic close-votes. Should we send such questions to superuser.com, ...
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2answers
100 views

Are questions on specific implementations of crypto in a specific device/application/system on topic?

Would it be permissible to ask questions like "What sort of encryption does IE 9 support in HTTPS mode" or "What sort of cryptography does the iPhone use to keep user 3g data secure"? Edit by ...