Top new questions this week:
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I just watched the movie "The imitation game" (2014) which is based on Alan Turing's biography.
At some point in the movie the machine built by Turing wasn't fast enough to decrypt the ...
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Is it possible to derive a secure cryptographic key from an array of sorted bytes, assuming the bytes themselves were generated in a secure manner (say, from quantum phenomenon)?
What would be the ...
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This question arises because I couldn't find any official paper for the Schnorr identification scheme, but only for the Smart-Card implementation of it. Also, it seems that everyone, when talking ...
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According to keccak strengths you have:
Unlike SHA-1 and SHA-2, Keccak does not have the length-extension weakness, hence does not need the HMAC nested construction. Instead, MAC computation can be ...
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With this question I am referring to the BGW multiplication by Gennaro et al (PDF here).
The multiplication is described on the 4th page.
(Another source for me was "A pragmatic Introduction to ...
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I am reading up on Key Deriving Functions (KDF) and in a section of the Real-World Cryptographic book by David Wong, a comparison is being made with Pseudorandom number generator (PRNG). And one of ...
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In the elliptic curve encryption scheme, there is a cyclic group generated by a base point $G$ on the elliptic curve.
Given a random point on the elliptic curve, is there a way to decide if the random ...
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Greatest hits from previous weeks:
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I'm new to SSL / TLS, and I want to work with the OpenSSL toolkit.
What do .pem and .csr stand for?
I do know that ...
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Both crypto.SE and security.SE have excellent Q&As about how TLS generates session keys (I have linked some at the bottom).
In reading these threads I'm having troubles with terminology since the ...
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What is the difference in the purpose of DH and RSA? Aren't they both public-key encryption?
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Background
I am a novice in the field of cryptography and cyber-security, and while studying asymmetric-key encryption, I learned about the potential of a man-in-the-middle attack.
To mitigate this ...
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I'm a beginner to cryptography and looking to understand in very simple terms what a cryptographic "salt" is, when I might need to use it, and why I should or should not use it.
Can I get a ...
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Using CryptoJS 3.1 I noticed that using 3Des, the encrypted message always start with
U2FsdGVkX1
Why is the first part of the encryption always the same?
What information does this hold and how ...
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I would like to ask for a clear (but maybe not so deep) explanation of what the term "perfect secrecy" means.
As far as I have researched and understood, it has to do with probabilities of assuming ...
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Can you answer these questions?
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I'm learning about common modulus attack and learned that public modulus attacks can find out the private key.
Assume there are 2 users with public and private keys $(e_1, d_1)$ and $(e_2, d_2)$. ...
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In the FIPS202 document "SHA-3 Standard: Permutation-Based Hash and Extendable-Output Functions" an extendable-output functions is defined as:
An extendable-output function (XOF) is a ...
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EDIT: I want to specify what I know about schemes security:
Authentication schemes: P can prove V he is P, and nobody else can prove V that they are P.
Identification schemes: P can prove V he is P, ...
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