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:
× 40
a fast and simple stream cipher used correctly in SSL and incorrectly in WEP.
× 39
an encryption algorithm which works by replacing plaintext units with corresponding ciphertext units, following some rule depending on the key.
× 38
The attacker can specify his own plain text and encrypt or sign it.
× 36
The Galois Counter Mode, an authenticated encryption mode of operation for a block cipher.
× 36
Questions about formal definitions of "security" for various cryptographic schemes (e.g. perfect secrecy, semantic security, ciphertext indistinguishability, etc.)
× 36
the detailed analysis of the security of an abstract or concrete cryptographic protocol.
× 34
A way, esp. one of several possible variations, in which a set or number of things can be ordered or arranged.
× 34
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).
× 34
a threshold secret sharing scheme based on polynomial interpolation over a finite field.
× 33
a United States Federal Government standard or FIPS for digital signatures. It was proposed by the National Institute of Standards and Technology (NIST) in Aug…
× 31
an intentionally slow hash algorithm specially designed for passwords.
× 30
A cryptographically secure pseudorandom number generator is a pseudo-random number generator with properties that make it suitable for use in cryptography.
× 30
a mode of operation for a block cipher, with the characteristic that each possible block of plaintext has a defined corresponding ciphertext value and vice versa.
× 30
(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…
× 27
an object-oriented programming language. Java programs are compiled to bytecode and run in a virtual machine (JVM). Java should not be confused with JavaScript; JavaScript is an entirely diff…
× 26
A slow and memory-intensive hash function designed for passwords
× 26
a cryptographic hash function standardized by NIST as a new alternative to the SHA-2 hash function family.
× 26
A model used in cryptographic security proofs, in which concrete primitives such as hash functions are replaced with a "random oracle": a hypothetical black box that maps its inputs to truly random ou…
× 26
a family of symmetric block-ciphers with block and keys sizes of 128, 160, 192, 224, or 256 bits.
× 26
short for Public Key Infrastructure. The foundation of a PKI is the certificate authority (CA), which issues digital certificates that authenticate the identity of organizations and individuals…
× 26
Hash-based digital signatures, such as Lamport one-time signatures, are digital signature schemes based on a (non-trapdoor) one-way function such as a cryptographic hash. Such schemes are expected to …
× 26
In a cryptographic sense, integrity means unimpaired and complete.
× 26
A block cypher encryption algorithm built from applying three iterations of the original DES algorithm.
× 25
Cryptographic hardware enables the handling of cryptographic tasks and/or problems using hardware instead of software solutions.
× 25
Difficulty of finding an input string that hashes to a given value
× 25
Using the same key for more than one purpose, e.g. to encrypt two messages or to encrypt and authenticate a message. Some cryptosystems may be vulnerable to attacks if keys are inappropriately reused.
× 25
Questions about official cryptographic standards and their implementation.
× 24
Linear Feedback Shift Register, a pseudorandom bit generator which can be efficiently implemented in hardware.
× 24
Encryption using a key derived from a password or passphrase entered by the user.
× 24
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.
× 24
A structured set of data held in a computer, esp. one that is accessible in various ways.
× 23
an attack model for cryptanalysis in which the cryptanalyst gathers information, at least in part, by choosing a ciphertext and obtaining its decryption under an un…
× 23
a structure that has been used to create a number of different block ciphers (e.g., DES, Blowfish, Twofish, RC6).
× 23
Quantum cryptography describes the use of quantum mechanical effects to perform cryptographic tasks or to break cryptographic systems.
× 22
a password that is valid for only one session or transaction.
× 22
a cryptographic hash function designed by Guido Bertoni, Joan Daemen, Michaël Peeters, and Gilles Van Assche.