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May
12
comment Is XOR in a CBC-like mode secure?
I went for CBC-like as that's the best I could explain it, as opposed to just "this algorithm", but feel free to improve, anyone. If I can come up with a better one, I will, when it's not so late :)
May
12
comment Is XOR in a CBC-like mode secure?
Hello, welcome to crypto; I edited your title to be a little more descriptive (I realise you probably didn't know what to put as the title :)) - if you want to improve it, or roll it back, there is an edit link directly underneath your question which you can use at any time :)
May
9
comment Chinese Remainder Theorem and RSA
@MihaiTodor we support LaTeX notation using $ symbols to enter maths, if you need to edit your question. Works in both comments and questions, e.g. $m = m_2 + (h * q)$, where $h = q_{inv} * (m_1 - m_2) \mod p$ :)
Apr
25
comment cipher text only attack - how to know when to stop when brute-force attack?
@gAsk in that case, can I make a suggestion? Give your question a quick edit - thoroughly demonstrate the relevant bits of your work so far. Walk us through it, with relevant examples. If you make an edit and then reply to us here, we can always re-open the question. Closure is not final. If you're struggling with what to add, feel free to grab us in chat.
Apr
23
comment Can a proof be constructed to show there is no distinguisher?
Welcome to crypto.se; your Q has been moved here on account of being more on topic here than on SO - do feel free to register an account to pick up your rep and more importantly responses here :)
Apr
23
comment How secure is the Vigenère cipher in file encryption if you encrypt the password first?
I've taken your "please explain downvoting" out of the question as it kinda gets in the way of the question - and the comment should do it. Unfortunately, there's no requirement on anyone to explain their voting - it's totally anonymous, even from moderators. There have been proposals to require comments and they've been declined - have a look here.
Apr
21
comment Does the Biclique attack on AES pose a credible risk to its security?
Right - I've gone in with a fairly audacious edit - if you don't like it or it isn't what you meant, do feel free to edit/improve it. I have basically taken out the references to all attacks and asked about this specific one, which should help you get the answers you're looking for, I think. If you need help, do feel free to reply to me here, or via a flag, or ask on meta.
Apr
21
comment Does the Biclique attack on AES pose a credible risk to its security?
Is this the attack you're referring to? If so, a question specifically on that attack would be much more focused, as Gilles says. Underneath your question there is an edit link if you want to revise your question :)
Apr
11
comment Verilog simulation & synthesis of Diffie-Hellman key exchange
Just a friendly note - you don't need to use signatures in posts here - the signature in the bottom left gives you all the signature you need. This is to keep the page relatively clean. For more information have a look at this discussion.
Apr
10
comment How does a chosen plaintext attack on RSA work?
@PaĆ­loEbermann Hmmm, you could be right, actually. I think I've got my terminology all confused. Gonna edit, two seconds.
Apr
9
comment Diffie hellman key exchange on elliptic curve over an extension field
Ok, obvious questions - what have you tried and where are you stuck? If you're asking for us to implement the entire thing for you... we might struggle to do that, as you could be asking us to teach you quite a bit. However, if you've got to a certain point and are struggling with something - definitely edit in an explanation. To help you understand the problem with this Q as is, please see this post.
Apr
9
comment Is AES restricted to only 64 characters for the key/password?
I edited this one as well to help you with your English - it should read better now. As always, if there's anything I've mis-interpreted, feel free to fix it :)
Apr
9
comment Does encrypting twice using the same block cipher produce a security weakness?
no problem :) I think as you're interested in block ciphers it might be better to focus on those - if you're then curious about public key systems you could always then ask another question. I'll go ahead and change it.
Apr
9
comment Does encrypting twice using the same block cipher produce a security weakness?
Hi rezx, I have edited your question to tidy it up and I think better reflect what you are asking (you're asking with regards to truecrypt I believe?). If I've mis-interpreted, please feel free to click the edit link and improve on my edit. Do you think it would be a good idea to re-title the algorithm to specifically mention block ciphers, or are you interested in the general case too?
Apr
3
comment How big an RSA key is considered secure today?
Thought you'd be interested to know I submitted this question to be promoted on the Stack Exchange social media outlets - also, question - because you've edited the answer so many times its turned into "community wiki" i.e. the edit bar is lower and you get no rep for upvotes. Want me to turn it back? It's an auto feature designed to credit multiple authors (which there aren't in this case), but if a mod reverts the CW conversion, it'll stay reverted forever.
Apr
1
comment How secure is AES-256?
A side note; in general, this question crypto.stackexchange.com/questions/579/… has some good answers on how we can reason about government capabilities.
Mar
28
comment Can a user of a password-protected Wi-Fi sniff on other user's communication?
This might functionally be answered by this question on security?
Mar
24
comment Educational videos for security topics
I'm going to close this for now - for starters, it's not specifically about cryptography and we really need a way to make it answerable - as opposed to questions asking for lists which don't really work very well with us. You can edit your question at any time - if you can nail down exactly what you're looking for and make it less list-inviting, I and the other mods will happily look at it again :)
Mar
22
comment Cost of attacking Mobile OTP with a fake server
Welcome to crypto :) Just a quick note - if you ever need to add additional detail to an answer, there's an edit link underneath you can use at any time. Do feel free to use this to provide additional detail/clarifications/improvements, rather than adding comments :)
Mar
20
comment john the ripper, usages
@VineetMenon I can migrate it, but I did ask them and I think they'd want it focusing on a more specific problem first :) But when you're done with editing, yes, can migrate no probs.