Tags

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.

a family of stream ciphers built on a pseudo-random function.
77 questions
Format-preserving encryption (FPE) refers to encrypting in such a way that the output has the same length as the input, or otherwise has the same format or structure as the input.
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a sequence of bytes or bits, having a fixed length (the block-size).
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A slow and memory-intensive hash function designed for passwords
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based on a mathematical problem that is moderate hard to solve but easy to verify.
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A structured set of data held in a computer, esp. one that is accessible in various ways.
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a method of hierarchically hashing data. They allow efficient parallel hashing and updates and the possibility of verifying partial data.
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A digital signature scheme based on the discrete logarithm problem, published by Taher ElGamal in 1984. Not to be confused with the ElGamal encryption system.
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an authentication protocol (described in RFC 4252) for securely getting access to a remote computer.
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a computational problem which serves as the foundation of new cryptographic algorithms, such as NewHope, designed to protect against cryptanalysis by quantum comput…
a password hash or password-based key derivation function, which won the password-hashing competition in 2015.
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A distinguisher describes an adversary's advantage. In cryptography, an adversary's advantage is a measure of how successfully it can attack a cryptographic algorithm, by distinguishing it from an ide…
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Anonymity describes the state of being unknown or unacknowledged.
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used to estimate the likelihood of a hypothesis given a set of data. In cryptanalysis, statistical testing is commonly used to detect non-randomness in the data, e.g. distinguis…
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the process of making, adapting, or imitating objects, statistics, or documents with the intent to deceive. Use this tag on questions revolving around creating a forgery for a specific encr…
68 questions
A security property wherein past messages are protected against future compromise of the master keys.
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an encryption scheme where one can prove some property of a message m, while the message is given in an encrypted form. When an encryption scheme is secure, the encryption E(m…
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Secure storage describes storing resources in a secure way, so that they are only available to authorized users and trusted networks.
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Difficulty of finding another input string that hashes to the same value as a given string
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a cryptographic message authentication code (MAC) written by Daniel J. Bernstein. It can be used to verify the data integrity and the authenticity of a message.
63 questions
an optimized brute-force attack that significantly reduces the number of keys the attacker needs to try by utilizing a time-space trade-off. Work is done from the begi…
63 questions
In a blind signature scheme, the signer does not know what he is signing. This is an important building block of anonymous voting or digital cash schemes, because it allows an authority to control the…
61 questions
A side-channel attack on implementations of encryption modes that use padding (e.g. ECB, CBC) that uses information leaked during decryption of tampered ciphertext values to derive information about t…
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The Enigma Machine was a piece of cryptographic hardware used by the German military during World War II; successful cryptanalysis was routinely applied against it and the scheme was considered broken…
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a padding scheme for RSA, codifying how short plaintext is enciphered and deciphered. It has a security reduction to the RSA problem.
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a cryptosystem which always produces the same ciphertext for a given plaintext and key, even over separate executions of the encryption algorithm.
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a method for a group such as a meeting or an electorate to make a decision or express an opinion.
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used in Secure Multiparty Computation
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An adversary model formally defines the power of the adversary. It includes specifics whether the adversary is deterministic/randomized, uniform/non-uniform, interactive/non-interactive and how he int…
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concerned with sending messages via electronic signals in the most efficient and error-free way.
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a function that is easy to perform one way, but has a secret that is required to perform the inverse calculation efficiently.
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A length extension attack on a hash or message authentication code function, which allows extra information to be added to the input message without changing the output value.
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an encryption algorithm that can be used as a replacement for the DES or IDEA algorithms. Blowfish was designed in 1993 by Bruce Schneier as an alternative to existing encryption algorithm…
56 questions
Differential privacy aims to provide means to maximize the accuracy of queries from statistical databases while minimizing the chances of identifying its records.
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Transport security about establishing a real time secure channel from a sender to a receiver. Transport security generally requires more protection and a more intricate protocol than securing data at …
55 questions
a password that is valid for only one session or transaction.
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