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In cryptography, an adversary's advantage is a measure of how successfully it can attack a cryptographic algorithm, by distinguishing it from an idealized
Advantage_(cryptography)
Topics referred to by the same term
over an opposing force Advantage (cryptography), a measure of the effectiveness of an enemy's code-breaking effort Advantage, in tennis terminology,
Advantage
Cryptographic system with public and private keys
Public-key cryptography, or asymmetric cryptography, is the field of cryptographic systems that use pairs of related keys. Each key pair consists of a
Public-key_cryptography
Cryptography secured against quantum computers
Post-quantum cryptography (PQC), sometimes referred to as quantum-proof, quantum-safe, or quantum-resistant, is the development of cryptographic algorithms
Post-quantum_cryptography
Practice and study of secure communication techniques
Cryptography, or cryptology, is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally,
Cryptography
Cryptography based on quantum mechanical phenomena
schemes, or in quantum communication links and networks. These advantages make quantum cryptography important in the digital age, where devices are increasingly
Quantum_cryptography
Hash function that is suitable for use in cryptography
The resistance to such search is quantified as security strength: a cryptographic hash with n {\displaystyle n} bits of hash value is expected to have
Cryptographic_hash_function
Cyber attack whereby the attacker attempts to recover the key to an encryption scheme
attacks infeasible with current technology. In cryptography, the key-recovery advantage (KR advantage) of a particular algorithm is a measure of how effective
Key-recovery_attack
Cryptographic proof technique
In cryptography, the hybrid argument is a proof technique used to show that two distributions are computationally indistinguishable. Hybrid arguments had
Hybrid argument (cryptography)
Hybrid_argument_(cryptography)
In cryptography, the pseudorandom-function advantage (PRF advantage) of an algorithm on a pseudorandom function family is a measure of how effectively
PRF_advantage
Algorithm for public-key cryptography
cryptosystem) such as RSAES-OAEP, and public-key key encapsulation. In RSA-based cryptography, a user's private key—which can be used to sign messages, or decrypt
RSA_cryptosystem
Study of analyzing information systems in order to discover their hidden aspects
is used to breach cryptographic security systems and gain access to the contents of encrypted messages, even if the cryptographic key is unknown. In
Cryptanalysis
Cryptographic technique
Visual cryptography is a cryptographic technique which allows visual information (pictures, text, etc.) to be encrypted in such a way that the decrypted
Visual_cryptography
Project by NIST to standardize post-quantum cryptography
Post-Quantum Cryptography Standardization is a program and competition by NIST to update their standards to include post-quantum cryptography. It was announced
NIST Post-Quantum Cryptography Standardization
NIST_Post-Quantum_Cryptography_Standardization
American computer scientist (born 1963)
"kid sister cryptography", writing in the Preface to Applied Cryptography that: There are two kinds of cryptography in this world: cryptography that will
Bruce_Schneier
Information used for message authentication and integrity checking
In cryptography, a message authentication code (MAC), sometimes known as an authentication tag, is a short piece of information used for authenticating
Message_authentication_code
Type of cipher
In cryptography, a block cipher is a deterministic algorithm that operates on fixed-length groups of bits, called blocks. Block ciphers are the elementary
Block_cipher
Concept in cryptography
In cryptography, the avalanche effect is the desirable property of cryptographic algorithms, typically block ciphers and cryptographic hash functions
Avalanche_effect
British designation for intelligence from decrypted enemy communications
chief engineer Harold Keen. After the war, interrogation of German cryptographic personnel led to the conclusion that German cryptanalysts understood
Ultra_(cryptography)
Adding data to a message prior to encryption to hide its length
In cryptography, padding is any of a number of distinct practices which all include adding data to the beginning, middle, or end of a message prior to
Padding_(cryptography)
Computer hardware technology that uses quantum mechanics
applications during World War II; computers played a major role in wartime cryptography, while quantum physics was essential for nuclear physics, e.g., in the
Quantum_computing
Property of some cryptosystems
attack is equivalent to the property of semantic security, and many cryptographic proofs use these definitions interchangeably. A cryptosystem is considered
Ciphertext indistinguishability
Ciphertext_indistinguishability
Type of data structure
In cryptography and computer science, a hash tree or Merkle tree is a tree in which every "leaf" node is labelled with the cryptographic hash of a data
Merkle_tree
attack • Adaptive chosen plaintext and chosen ciphertext attack • Advantage (cryptography) • ADFGVX cipher • Adi Shamir • Advanced Access Content System
Index of cryptography articles
Index_of_cryptography_articles
Family of elliptic curves used in cryptography
finite fields is widely used in elliptic curve cryptography. Applications of Edwards curves to cryptography were developed by Daniel J. Bernstein and Tanja
Edwards_curve
In cryptography, a malicious entity
In cryptography, an adversary (rarely opponent, enemy) is an entity whose aim is to prevent the users of the cryptosystem from achieving their goal (primarily
Adversary_(cryptography)
Cryptography algorithm
In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide information security such as confidentiality or authenticity
Block cipher mode of operation
Block_cipher_mode_of_operation
Method of data encryption
'stackable' cryptographic filesystem layered on top of the main file system a single general-purpose file system with encryption The advantages of filesystem-level
Filesystem-level_encryption
Cryptographic secret, not public in contrast to salt
In cryptography, a pepper is a secret added to an input such as a password during hashing with a cryptographic hash function. This value differs from
Pepper_(cryptography)
Early unclassified symmetric-key block cipher
modern applications, it has been highly influential in the advancement of cryptography. Developed in the early 1970s at IBM and based on an earlier design by
Data_Encryption_Standard
Elliptic curve used in Internet cryptography
In cryptography, Curve25519 is an elliptic curve used in elliptic-curve cryptography (ECC) offering 128 bits of security (256-bit key size) and designed
Curve25519
Class of functions in cryptography
In cryptography, a pseudorandom permutation (PRP) is a function that cannot be distinguished from a random permutation (that is, a permutation selected
Pseudorandom_permutation
Encryption technique
one-time pad (OTP) is an encryption technique that cannot be cracked in cryptography. It requires the use of a single-use pre-shared key that is larger than
One-time_pad
American mathematician, cryptologist and computer scientist (born 1971)
Berkeley (1995), where he studied under Hendrik Lenstra. The export of cryptography from the United States was controlled as a munition starting from the
Daniel_J._Bernstein
Hiding messages in other messages
Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. The advantage of steganography over cryptography alone is that the intended
Steganography
American mathematician (1916–2001)
cryptography, with his work described as "a turning point, and marked the closure of classical cryptography and the beginning of modern cryptography"
Claude_Shannon
Cryptographic primitive
Non-interactive zero-knowledge proofs are cryptographic primitives, where information between a prover and a verifier can be authenticated by the prover
Non-interactive zero-knowledge proof
Non-interactive_zero-knowledge_proof
Post-quantum digital signature scheme
In cryptography, the unbalanced oil and vinegar (UOV) scheme is a modified version of the oil and vinegar scheme designed by J. Patarin. Both are digital
Unbalanced oil and vinegar scheme
Unbalanced_oil_and_vinegar_scheme
Computational benchmark
In quantum computing, quantum supremacy or quantum advantage is the goal of demonstrating that a programmable quantum computer can solve a problem that
Quantum_supremacy
Collection of efficiently-computable functions which emulate a random oracle
In cryptography, a pseudorandom function family, abbreviated PRF, is a collection of efficiently-computable functions which emulate a random oracle in
Pseudorandom_function_family
Algorithm that generates an approximation of a random number sequence
method), electronic games (e.g. for procedural generation), and cryptography. Cryptographic applications require the output not to be predictable from earlier
Pseudorandom_number_generator
Fraudulent cryptography claim
In cryptography, snake oil is any cryptographic method or product considered to be bogus or fraudulent. The name derives from snake oil, one type of patent
Snake_oil_(cryptography)
Cipher design construction
In cryptography, an SP-network, or substitution–permutation network (SPN), is a series of linked mathematical operations used in block cipher algorithms
Substitution–permutation network
Substitution–permutation_network
Mapping arbitrary data to fixed-size values
terms of data integrity. Hash tables may use non-cryptographic hash functions, while cryptographic hash functions are used in cybersecurity to secure
Hash_function
Quantum key distribution protocol
(e.g., Bob) measures them. The BB84 QKD scheme is the first quantum cryptography protocol, and has become one of the most well-studied QKD protocols.
BB84
authenticated public classical channel. E91 protocol (1991) is a quantum cryptography method that uses entangled pairs of photons to generate keys for secure
List of quantum key distribution protocols
List_of_quantum_key_distribution_protocols
Variant of ID-based cryptography
Certificateless cryptography is a variant of ID-based cryptography intended to prevent the key escrow problem. Ordinarily, keys are generated by a certificate
Certificateless_cryptography
Non-cryptographic hash function
Fowler–Noll–Vo (or FNV) is a non-cryptographic hash function created by Glenn Fowler, Landon Curt Noll, and Kiem-Phong Vo. The basis of the FNV hash algorithm
Fowler–Noll–Vo_hash_function
System to replace plaintext with ciphertext
In cryptography, a substitution cipher is a method of encrypting that creates the ciphertext (its output) by replacing units of the plaintext (its input)
Substitution_cipher
Allied cryptanalysis project during World War II
began sending technical assistance to upgrade their communications and cryptography capabilities. One part was to send them modified Enigma machines to secure
Magic_(cryptography)
Cryptographic principle that states everything except the key can be public knowledge
called Kerckhoffs's desideratum, assumption, axiom, doctrine or law) of cryptography was stated by the Dutch cryptographer Auguste Kerckhoffs in the 19th
Kerckhoffs's_principle
Function that derives secret keys from a secret value
In cryptography, a key derivation function (KDF) is a cryptographic algorithm that derives one or more secret keys from a secret value such as a master
Key_derivation_function
Cryptographic analysis
In cryptography, concrete security or exact security is a practice-oriented approach that aims to give more precise estimates of the computational power
Concrete_security
Simple type of polyalphabetic encryption system
that he intentionally kept the general method secret, since he was a cryptographical adviser to his friend, Rear-Admiral Sir Francis Beaufort, during the
Vigenère_cipher
Branch of cryptography
Neural cryptography is a branch of cryptography dedicated to analyzing the application of stochastic algorithms, especially artificial neural network algorithms
Neural_cryptography
Type of public-key encryption
Identity-based encryption (IBE), is an important primitive of identity-based cryptography. As such it is a type of public-key encryption in which the public key
Identity-based_encryption
Steganography software
unhides the hidden stream knowing the secret key The advantage of steganography, over cryptography alone, is that messages do not attract attention to
OpenPuff
Cryptographic algorithm for random number generation
CryptGenRandom is a cryptographically secure pseudorandom number generator function that is included in Microsoft CryptoAPI. In Win32 programs, Microsoft
CryptGenRandom
Network attack in which valid data transmission is repeated or delayed
networks that are unidirectional or near unidirectional, it can be an advantage. The trade-off being that replay attacks, if they are performed quickly
Replay_attack
American physicist, information theorist, and IBM Research fellow
developed a system of quantum cryptography, building on an idea of Stephen Wiesner. Known as BB84, the system takes advantage of the uncertainty principle
Charles H. Bennett (physicist)
Charles_H._Bennett_(physicist)
In cryptography, a hard-core predicate of a one-way function f is a predicate b (i.e., a function whose output is a single bit) which is easy to compute
Hard-core_predicate
Elliptic curve used in Internet cryptography
In cryptography, Curve448 or Curve448-Goldilocks is an elliptic curve potentially offering 224 bits of security and designed for use with the elliptic-curve
Curve448
Computational problem possibly useful for post-quantum cryptography
post-quantum cryptography, ring learning with errors (RLWE) is a computational problem which serves as the foundation of new cryptographic algorithms,
Ring_learning_with_errors
Type of symmetric key cipher
that can be transmitted (usually bytes). Another advantage of stream ciphers in military cryptography is that the cipher stream can be generated in a separate
Stream_cipher
System that regulates the formation of blocks on a blockchain
work (also written as proof-of-work, and abbreviated PoW) is a form of cryptographic proof in which one party (the prover) proves to others (the verifiers)
Proof_of_work
Concept in cryptography
In cryptography, a hybrid cryptosystem is one which combines the convenience of a public-key cryptosystem with the efficiency of a symmetric-key cryptosystem
Hybrid_cryptosystem
Secure communication method
distribution (QKD) is a secure communication method that implements a cryptographic protocol based on the laws of quantum mechanics, specifically quantum
Quantum_key_distribution
Quantum-safe key encapsulation mechanism
trapdoor function. It won the NIST competition for the first post-quantum cryptography (PQC) standard. and was subsequently standardized as FIPS 203. The system
ML-KEM
Cryptographic protocols for securing data in transit
Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network, such as the Internet.
Transport_Layer_Security
Cryptography library
Dell BSAFE, formerly known as RSA BSAFE, is a FIPS 140-2 validated cryptography library, available in both C and Java. BSAFE was initially created by RSA
BSAFE
Theories, models and concepts that go back to the quantum hypothesis of Max Planck
quantum cryptography, which will theoretically allow guaranteed secure transmission of information. An inherent advantage yielded by quantum cryptography when
Applications of quantum mechanics
Applications_of_quantum_mechanics
In cryptography, a padded uniform random blob or PURB is a discipline for encrypted data formats designed to minimize unintended information leakage either
PURB_(cryptography)
Network protocol for business-to-business data
AS2 (Applicability Statement 2) is a specification on how to transport structured business-to-business data securely and reliably over the Internet. Security
AS2
Computer security practice
Bring your own encryption (BYOE), also known as bring your own key (BYOK), is a cloud computing security model that allows cloud service customers to use
Bring_your_own_encryption
American writer and critic (1809–1849)
cryptogram can be solved, and he used this to his advantage. The sensation that Poe created with his cryptography stunts played a major role in popularizing
Edgar_Allan_Poe
Cryptography construction
In cryptography, a Feistel cipher (also known as Luby–Rackoff block cipher) is a symmetric structure used in the construction of block ciphers, named after
Feistel_cipher
Linux kernel interface for cryptography
Crypto API is a cryptography framework in the Linux kernel, for various parts of the kernel that deal with cryptography, such as IPsec and dm-crypt. It
Linux_kernel_crypto_API
Free and open-source disk encryption utility
have been addressed. VeraCrypt includes optimizations to the original cryptographic hash functions and ciphers, which boost performance on modern central
VeraCrypt
One common variation is to use letters. This was common in European cryptography and is found in the Uesugi cipher as well. However, the Japanese cipher
Japanese cryptology from the 1500s to Meiji
Japanese_cryptology_from_the_1500s_to_Meiji
Cryptographic attack
In cryptography, a collision attack on a cryptographic hash tries to find two inputs producing the same hash value, i.e. a hash collision. This is in
Collision_attack
Branch of mathematics that studies the properties of groups
chemistry, and materials science. Group theory is also central to public key cryptography. The early history of group theory dates from the 19th century. One of
Group_theory
Entity that verify the validity of digital certificate
In public key infrastructure, a validation authority (VA) is an entity that provides a service used to verify the validity or revocation status of a digital
Validation_authority
Cryptographic hardware
In cryptography, the EFF DES cracker (nicknamed "Deep Crack") is a machine built by the Electronic Frontier Foundation (EFF) in 1998, to perform a brute
EFF_DES_cracker
Universal hash family used for message authentication in cryptography
universal hash family designed by Daniel J. Bernstein in 2002 for use in cryptography. As with any universal hash family, Poly1305 can be used as a one-time
Poly1305
Use of computer hardware to assist software in the process of data encryption
the ARM architecture. However, more unusual systems exist where the cryptography module is separate from the central processor, instead being implemented
Hardware-based_encryption
Appearing random but actually being generated by a deterministic, causal process
significant advantage. This notion of pseudorandomness is studied in computational complexity theory and has applications to cryptography. Formally, let
Pseudorandomness
Information held in the state of a quantum system
quantum cryptography is quantum key distribution which provide a theoretical solution to the security issue of a classical key. The advantage of quantum
Quantum_information
British cryptographer (born 1950)
Communications Headquarters (GCHQ), he developed an early public-key cryptography (PKC) system. This pre-dated commercial offerings, but due to the classified
Clifford_Cocks
1843 short story by Edgar Allan Poe
readers to challenge his skills as a code-breaker. He took advantage of the popularity of cryptography as he was writing "The Gold-Bug", and the success of
The_Gold-Bug
Quantum states of two qubits
state. The following quantum circuit describes teleportation: Quantum cryptography is the use of quantum mechanical properties in order to encode and send
Bell_state
Quantum computing chip
allocation. Popular media responses discussed its risk in breaking cryptographic systems, but a Google spokesman said that they were still at least 10
Willow_processor
Stream ciphers
designed in 2005, then later submitted to the eSTREAM European Union cryptographic validation process by Bernstein. ChaCha is a modification of Salsa20
Salsa20
Protecting information by mitigating risk
1163/2210-7975_hrd-9970-2016117. Easttom, William (2021), "Elliptic Curve Cryptography", Modern Cryptography, Cham: Springer International Publishing, pp. 245–256, doi:10
Information_security
Asymmetric encryption algorithm developed by Robert McEliece
In cryptography, the McEliece cryptosystem is an asymmetric encryption algorithm developed in 1978 by Robert McEliece. It was the first such scheme to
McEliece_cryptosystem
General form of cryptanalysis applicable primarily to block ciphers
turn would weaken the competitive advantage the United States enjoyed over other countries in the field of cryptography." Within IBM, differential cryptanalysis
Differential_cryptanalysis
HTTP extension supporting TLS encryption
Archived from the original on 2019-02-09. Retrieved 2018-10-20. "Practical Cryptography". Schneier on Security. ISBN 0471223573. Retrieved 2026-04-14. Pusep
HTTPS
Practice of hiding information
Techniques used include physical security and cryptography. The latter depends on the secrecy of cryptographic keys. Many believe that security technology
Secrecy
Free and open-source anonymity network
project regularly presented at scientific conferences in cybersecurity and cryptography, including USENIX, NDSS, and Privacy Enhancing Technologies Symposium
Nym_(mixnet)
Password that can only be used once
pseudorandomness or randomness to generate a shared key or seed, and cryptographic hash functions, which can be used to derive a value but are hard to
One-time_password
Computing company founded in 2014
quantum-computing-hardened encryption keys designed to protect data assets and enhance cryptographic defenses. Formed in 2021, Quantinuum is the combination of the quantum
Quantinuum
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