A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

Type to find tags:
× 37
a family of symmetric block-ciphers with block and keys sizes of 128, 160, 192, 224, or 256 bits.
× 8
The RACE Integrity Primitives Evaluation Message Digest (RIPEMD) is a family of cryptographic hash functions.
× 919
an asymmetric (e.g. public-key) cryptosystem, based on modular exponentiation with big exponents and modulus. RSA can be used both for signature and encryption.
a variant of RSA, meant to increase the RSA public modulus size while keeping computation cost moderate.
× 14
a prime number of the form 2p + 1, where p is also a prime.
× 24
a family of stream ciphers built on a pseudo-random function.
× 84
unique (usually random) data passed into a hash function for password storage to avoid the possible usage of rainbow tables or similar attacks. Salt will not help against dictionary or brute f…
× 52
(or substitution boxes), components in many block ciphers used to substitute parts of the data in a non-linear way. While often fixed by the algorithm (like in DES and AES), sometimes they are key-dep…
× 6
The Schnorr Identification Protocol relies upon the security of the Discrete Logarithm Problem. Schnorr's protocol was introduced after, and is comparable to, the identification protocol of Fiat and S…
× 23
A digital signature algorithm based on the discrete logarithm problem, provably secure in the random oracle model.
× 35
A slow and memory-intensive hash function designed for passwords
× 4
a toy variant of the DES cipher introduced by Edward F. Schaefer in 1996 for educational purposes. It has an 8-bit block size and a 10-bit key, and uses two rounds, with two 4x2 bit …
× 6
a subfield of cryptography which constructs and analyzes cryptosystems that preserve the ability to 'search' over encrypted data, for some definition of 'search'.
× 106
Secret sharing refers to splitting a secret among multiple parties so that together they can reconstruct it. All parties, or just a threshold number of them, can be required for reconstruction. If few…
× 7
× 2
× 15
Secure storage describes storing resources in a secure way, so that they are only available to authorized users and trusted networks.
× 59
Questions about formal definitions of "security" for various cryptographic schemes (e.g. perfect secrecy, semantic security, ciphertext indistinguishability, etc.)
× 28
produces ciphertext that, by itself, does not reveal information about the original message besides its length
× 18
A symmetric block cipher algorithm with a 128 bit block size, and key sizes up to 256 bits.
× 107
a hash function that will soon be two generations old. It is no longer considered secure and should only be used for backward compatibility.
× 52
a family of cryptographic hash functions designed by the NSA and published by NIST in 2001. The family includes various output lengths (224, 256, 384, and 512 bits).
× 128
part of the SHA-2 family of hash functions with a 256-bit output and a 128-bit security level.
× 34
a cryptographic hash function standardized by NIST as a new alternative to the SHA-2 hash function family.
SHA-3 Competition (2007-2012) was a competition initiated by NIST as a call for a new cryptographic hash algorithm for standardization purposes.
× 29
part of the SHA-2 family of hash functions with a 512-bit output and a 256-bit security level.
Blockcipher based on the compression function of SHA-256. This cipher interprets the internal compression function of SHA-256 as blockcipher. The key is provided as "input data" and the input is fed i…
× 52
a threshold secret sharing scheme based on polynomial interpolation over a finite field.
× 41
attacks using information leaked by implementations of cryptographic algorithms to obtain information about keys or (plaintext) data, instead of (or additional to) using cryptographic weaknesses.
× 381
Algorithms and protocols for creating signatures to documents, and verifying such signatures. These are normally asymmetric, for symmetric signatures see [mac].
× 7
A family of lightweight symmetric block-ciphers designed for good performance in hardware with block sizes ranging from 32 to 128 bits and key sizes ranging from 64 to 256 bits.