The security-analysis tag has no wiki summary.
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Is a small size block cipher usable?
Consider a block cipher with a key of size 128 bits but a small block size, say 32 bits, is this kind of block cipher secure ?
Thank you.
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Have these compositions of block ciphers the same security?
I'm interested by the compositions of the block cipher DES, instantiated with independent keys $k_1$, $k_2$ and $k_3$.
Are these 3 compositions equivalent in terms of security?
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Proofs of security methodologies
I'm looking for course material on the subject of proofs, reductions, and games, as used to prove cryptographic schemes secure. What are the methodologies? What are the preferred ones? In what cases ...
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Composition of block ciphers and 3DES
There is some intriguing things about DES and 3DES. Now, I know that DES is weak and 3DES was an attempt to construct a more secure block-cipher from a deprecated one.
Having this in mind, what ...
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Secure use-cases of block cipher with 64-bit block size
In what cases can we use a weak block cipher like DES ?
More precisely, Are there specific situation in which a weaken block cipher can still be used, for instance for certain types of plaintext ?
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Acceptable assumptions when prooving security
Considering the output of a cryptographic primitive, like an encryption scheme (CBC, ...), a hash function or even the output of any schemes based on number theoretic assumptions, is it reasonable ...
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Security of Pohlig-Hellman exponentation cipher?
I am looking into implementing Pohlig-Hellman exponentation cipher and I would like to know how secure that algorithm is? I am guessing it's security relates greatly to the prime number used in it. ...
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Initialize a PRNG with a password
Let's assume that we have a secure PRNG. Is it "safe" to initialize it with password, or seed based on a password like SHA256(password).
If yes, is it "safe" to generate as RSA or DSA key from it? If ...
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A situation where security by obscurity might be the best solution - or am I wrong?
Imagine the following situation. There is an application for a microcontroller-driven system. The profits are made from manufacturing and selling the device itself. However, it is expected, that the ...
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Is there a security analysis of CryptDB?
Its interesting to see critical thinking being applied to cryptDB in contrast to all the hoopla around it here . cryptDB is not a major theoretical breakthrough but potpourri of technologies to make ...
