Top new questions this week:
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I am looking for some reference documentation suggesting a minimum reasonable length for a truncated hash (specifically, a truncated SHA-256 hash) to ensure preimage resistance.
Obviously, truncating ...
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In several prime generation schemes I saw we pick a random number uniformly at random from a wide range and find the next prime after it.
Obviously with such a scheme some primes are more likely than ...
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There are some languages that people haven't been able to read (Cretan Hieroglyphics for example).
Does that mean that you can better protect data by making your own language than by encrypting an ...
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I'm having difficulty finding documentation for the over-the-air protocols used by encrypted public safety radios. It seems that most systems are based on Project 25, previously known as APCO Project ...
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In the context of ECC.
There's an EC point $P$ which is supposed to be a known power of another known point $G$ (generator). That is:
$P = [k]G$ (in additive notation)
This should be verified on an ...
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I'm trying to follow Schneier's self-study course in cryptanalysis and am ashamed to say I am stuck on the very first problem of breaking 8-round RC5 without any rotations (i.e. just XOR and modular ...
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I'm familiarized with the structure of branching found in Multivariate Cryptography, as it allows us to partition a $n$-tuple over $F_{q}$ into a $k$-tuple where the $i$-th element is in ...
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Greatest hits from previous weeks:
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A message may be accompanied with a digital signature, a MAC or a message hash, as a proof of some kind.
Which assurances does each primitive provide to the recipient?
What kind of keys are needed?
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I'm new to SSL / TLS and I want to work with the OpenSSL toolkit.
I don't know what .pem and .csr stands for?
I do know that .key is the private key and .crt is the public key.
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My question might appear the same as the question Taking advantage of one-time pad key reuse?, but actually I did read all the answers and none of them helped me with the details I need.
I am new to ...
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Can I remove new lines from the RSA public key file to get a one line string? So the question is if the key looks like this
AAA
BBB
CCC
or
AAA\n\rBBB\n\rCCC\n\r
is this the same as
AAABBBCCC
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I would like to audit how an implementation of an encryption algorithm is really performed with the following given data of the problem:
the encryption mechanism is reversible (this isn’t a ...
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Much of the literature and latest papers suggest that homomorphic encryption is still not practical yet.
How is CipherCloud able to achieve this? Does anyone have an idea? Their website does not ...
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HMAC-based One Time Password (HOTP) was published as an informational IETF RFC 4226 in December 2005. In May, 2011, Time-based One-time Password Algorithm (TOTP) officially became RFC 6238. What ...
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Can you answer these questions?
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Consider an encrypted message m which is encrypted with AES-CBC, so in addition to the message there is an IV supplied initially. If I understand correctly the IV and afterwards the prior ciphertext ...
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First I'll explain the problem, then I will also give a solution(it might be wrong) I've found for it, you let me know what you think about this solution and whether you have a better one.
Assume a ...
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Background:
I am attempting to implement the paper Publicly Verifiable Secret Sharing. I managed to get it working using modular groups, but when I want to make it more efficient by transferring to ...
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