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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
Used for encoding or decoding ciphertext
A key in cryptography is a piece of information, usually a string of numbers or letters that are stored in a file, which, when processed through a cryptographic
Key_(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
Algorithm
Symmetric-key algorithms are algorithms for cryptography that use the same cryptographic keys for both the encryption of plaintext and the decryption
Symmetric-key_algorithm
Number of bits in a key used by a cryptographic algorithm
In cryptography, key size or key length refers to the number of bits in a key used by a cryptographic algorithm (such as a cipher). Key length defines
Key_size
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
Mathematical scheme for verifying the authenticity of digital documents
sender known to the recipient. Digital signatures are a type of public-key cryptography, and are commonly used for software distribution, financial transactions
Digital_signature
Cryptography based on quantum mechanical phenomena
aspect of quantum cryptography is quantum key distribution (QKD), which offers an information-theoretically secure solution to the key-exchange problem
Quantum_cryptography
Concept in cryptography
Hash-based cryptography is the generic term for constructions of cryptographic primitives based on the security of hash functions. It is of interest as
Hash-based_cryptography
Server on which public keys are stored for others to use
In computer security, a key server is a computer that receives and then serves existing cryptographic keys to users or other programs. The users' programs
Key_server_(cryptographic)
Approach to public-key cryptography
Elliptic-curve cryptography (ECC) is an approach to public-key cryptography based on the algebraic structure of elliptic curves over finite fields. ECC
Elliptic-curve_cryptography
Term applied to cryptographic systems that are highly resistant to cryptanalysis
Strong cryptography or cryptographically strong are general terms used to designate the cryptographic algorithms that, when used correctly, provide a very
Strong_cryptography
Type of functions designed for being unsolvable by root-finding algorithms
it suitable for use in cryptography. It is also referred to as a cryptographic random number generator (CRNG). Most cryptographic applications require random
Cryptographically secure pseudorandom number generator
Cryptographically_secure_pseudorandom_number_generator
Cryptography, the use of codes and ciphers, began thousands of years ago. Until recent decades, it has been the story of what might be called classical
History_of_cryptography
Secure communication method
Quantum key distribution (QKD) is a secure communication method that implements a cryptographic protocol based on the laws of quantum mechanics, specifically
Quantum_key_distribution
Algorithm for public-key cryptography
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 messages sent
RSA_cryptosystem
Cryptographic primitives that involve lattices
constructions support important standards of post-quantum cryptography. Unlike more widely used and known public-key schemes such as the RSA, Diffie-Hellman or elliptic-curve
Lattice-based_cryptography
Method of exchanging cryptographic keys
Diffie–Hellman (DH) key exchange is a mathematical method of securely generating a symmetric cryptographic key over a public channel and was one of the
Diffie–Hellman_key_exchange
Random data used as an additional input to a hash function
salt and the password (or its version after key stretching) are concatenated and fed to a cryptographic hash function, and the output hash value is then
Salt_(cryptography)
This glossary lists types of keys as the term is used in cryptography, as opposed to door locks. Terms that are primarily used by the U.S. National Security
Glossary of cryptographic keys
Glossary_of_cryptographic_keys
Scientific organization for research in cryptology
cryptography, and one symposium: Crypto (flagship) Eurocrypt (flagship) Asiacrypt (flagship) Fast Software Encryption (FSE) Public Key Cryptography (PKC)
International Association for Cryptologic Research
International_Association_for_Cryptologic_Research
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
Process of converting plaintext to ciphertext
keys. The two main types of keys in cryptographic systems are symmetric-key and public-key (also known as asymmetric-key). Many complex cryptographic
Encryption
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 addition
Cryptanalysis
Aspect of cryptography
system; a key setup phase, where a symmetric encryption key is formed by employing public-key cryptography; and an application-level data transport function
Cryptographic_protocol
System that can issue, distribute and verify digital certificates
distribute, use, store and revoke digital certificates and manage public-key cryptography set-ups. The purpose of a PKI is to facilitate the secure storage and/or
Public_key_infrastructure
Project by NIST to standardize post-quantum cryptography
quantum resistant, efforts have focused on public-key cryptography, namely digital signatures and key encapsulation mechanisms. In December 2016 NIST initiated
NIST Post-Quantum Cryptography Standardization
NIST_Post-Quantum_Cryptography_Standardization
Algorithm for encrypting and decrypting information
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed as a
Cipher
Practice in cryptography
In cryptography, forward secrecy (FS), also known as perfect forward secrecy (PFS), is a feature of specific key-agreement protocols that gives assurances
Forward_secrecy
Group of public-key cryptography standards
Public Key Cryptography Standards (PKCS) are a group of public-key cryptography intervendor standards first developed by RSA Security, with involvement
PKCS
International standard
certificate-based key management, such as the profile defined by the PKIX working group. CMS is used as the key cryptographic component of many other cryptographic standards
Cryptographic_Message_Syntax
Encrypted information
Private-key cryptography (symmetric key algorithm): one shared key is used for encryption and decryption Public-key cryptography (asymmetric key algorithm):
Ciphertext
Cryptography software library
NaCl (Networking and Cryptography Library, pronounced "salt") is a public domain, high-speed software library for cryptography. NaCl was created by the
NaCl_(software)
American cryptographer (born 1952)
mathematician. He is one of the inventors of public-key cryptography, the inventor of cryptographic hashing, and more recently a researcher and speaker
Ralph_Merkle
Short sequence of bytes used to authenticate or look up a longer public key
In public-key cryptography, a public key fingerprint is a short sequence of bytes used to identify a longer public key. Fingerprints are created by applying
Public_key_fingerprint
Cryptographic method
Key exchange (also key establishment) is a method in cryptography by which cryptographic keys are exchanged between two parties, allowing use of a cryptographic
Key_exchange
Public-key cryptosystem
In cryptography, a key encapsulation mechanism (KEM) is a public-key cryptosystem that allows a sender to generate a short secret key and transmit it to
Key_encapsulation_mechanism
Variable containing a public key in Windows NT 4.0
Corporation. The variable contained a 1024-bit public key; public keys are used in public-key cryptography for encryption and digital signature verification
NSAKEY
Basic cryptographic algorithm used to build cryptographic protocols
Cryptographic primitives are well-established, low-level cryptographic algorithms that are frequently used to build cryptographic protocols for computer
Cryptographic_primitive
Transient-key cryptography is a form of public-key cryptography wherein keypairs are generated and assigned to brief intervals of time instead of to individuals
Transient-key_cryptography
Field of asymmetric cryptographic primitives
Multivariate cryptography is the generic term for asymmetric cryptographic primitives based on multivariate polynomials over a finite field F {\displaystyle
Multivariate_cryptography
Class of cipher
In the history of cryptography, a grille cipher was a technique for encrypting a plaintext by writing it onto a sheet of paper through a pierced sheet
Grille_(cryptography)
In cryptography, a key signature is the result of a third-party applying a cryptographic signature to a representation of a cryptographic key. This is
Key_signature_(cryptography)
Protocol for agreeing on a cryptographic key
In cryptography, a key-agreement protocol is a protocol whereby two (or more) parties generate a cryptographic key as a function of information provided
Key-agreement_protocol
Computer communications authentication algorithm
In cryptography, an HMAC (sometimes expanded as either keyed-hash message authentication code or hash-based message authentication code) is a specific
HMAC
Non-federated cryptographic protocol
Protocol (formerly known as the TextSecure Protocol) is a non-federated cryptographic protocol that provides end-to-end encryption for voice and instant messaging
Signal_Protocol
Early unclassified symmetric-key block cipher
criticism received from public-key cryptography pioneers Martin Hellman and Whitfield Diffie, citing a shortened key length and the mysterious "S-boxes"
Data_Encryption_Standard
American cryptographer (born 1944)
pioneers of public-key cryptography along with Martin Hellman and Ralph Merkle. Diffie and Hellman's 1976 paper New Directions in Cryptography introduced a
Whitfield_Diffie
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
American cryptologist and academic (born 1945)
cryptologist and mathematician, best known for his invention of public-key cryptography in cooperation with Whitfield Diffie and Ralph Merkle. Hellman is a
Martin_Hellman
Placeholder characters
Public-key Cryptosystems". Subsequently, they have become common archetypes in many scientific and engineering fields, such as quantum cryptography, game
Alice_and_Bob
Software development tool for security
Explorer. Java Secure Socket Extension Keyring (cryptography) Public key infrastructure The keytool Command - a key and certificate management utility CERTivity
Java_KeyStore
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)
Cryptographic attack
In cryptography, a timing attack is a side-channel attack in which the attacker attempts to compromise a cryptosystem by analyzing the time taken to execute
Timing_attack
Ability to easily switch cryptographic primitives
crypto-agility. A public key certificate has cryptographic parameters including key type, key length, and a hash algorithm. X.509 version v.3, with key type RSA, a
Cryptographic_agility
Means to confirm a user's identity
secret: a memorized secret and two types of cryptographic keys, either a symmetric key or a private key. A memorized secret is intended to be memorized
Authenticator
Block cipher
191–204. Archived from the original on 2014-01-26. "Cryptography: Description of a New Variable-Length Key, 64-Bit Block Cipher (Blowfish)". Schneier on Security
Blowfish_(cipher)
The tables below compare cryptography libraries that deal with cryptography algorithms and have application programming interface (API) function calls
Comparison of cryptography libraries
Comparison_of_cryptography_libraries
symmetric keys and asymmetric public key cryptography to solve this problem. For key authentication using the traditional symmetric key cryptography, this
Key_authentication
Simple and widely known encryption technique
of the simplest and most widely known encryption techniques used in cryptography. It is a type of substitution cipher in which each letter in the plaintext
Caesar_cipher
Cryptography standard
encrypted data. PKCS #7 is one of the family of standards called Public-Key Cryptography Standards (PKCS) created by RSA Laboratories. The latest version, 1
PKCS_7
Cryptographic algorithm for digital signatures
(DSA) which uses elliptic-curve cryptography. As with elliptic-curve cryptography in general, the bit size of the private key believed to be needed for ECDSA
Elliptic Curve Digital Signature Algorithm
Elliptic_Curve_Digital_Signature_Algorithm
Cryptanalytic method for unauthorized users to access data
In cryptography, a brute-force attack or exhaustive key search is a cryptanalytic attack that consists of an attacker submitting many possible keys or
Brute-force_attack
Early block substitution cipher
Playfair message is demonstrated to be cryptographically weak, as the detective is able to solve for the entire key making only a few guesses as to the formatting
Playfair_cipher
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
Method of encryption
In cryptography, a transposition cipher (also known as a permutation cipher) is a method of encryption which scrambles the positions of characters (transposition)
Transposition_cipher
Algorithm used to generate cryptographic keys
A key generator (or keygen) in cryptography is a protocol or algorithm used to generate a sequence with pseudo-random characteristics for use as an encryption
Key_generator
Type of substitution cipher
of a grid. The example key shows one way the letters can be assigned to the grid. The Pigpen cipher offers little cryptographic security. It differentiates
Pigpen_cipher
Number of standards related to cryptography
There are a number of standards related to cryptography. Standard algorithms and protocols provide a focus for study; standards for popular applications
Cryptography_standards
Cryptographic key management algorithm
In cryptography, the Double Ratchet Algorithm (previously referred to as the Axolotl Ratchet) is a key management algorithm that was developed by Trevor
Double_Ratchet_Algorithm
Simple encryption method
Rome, and used by Julius Caesar in the 1st century BC (see timeline of cryptography). ROT13 may be referred to as Rotate13, ROT-13, rotate by 13 places,
ROT13
System to verify the source and or authenticity of a message
based on a secret key shared by two parties to authenticate information transmitted between them. It is based on using a cryptographic hash or symmetric
Message_authentication
American mathematics and science writer (1914–2010)
paradox (Jul 1973) Tangrams (Aug 1974) Penrose tilings (Jan 1977) Public-key cryptography (Aug 1977) Hofstadter's Godel, Escher, Bach (Jul 1979) The Monster
Martin_Gardner
Cryptography standard
In cryptography, PKCS #8 is a standard syntax for storing private key information. PKCS #8 is one of the family of standards called Public-Key Cryptography
PKCS_8
1949 paper by Claude Shannon
as the one-time pad. The paper serves as the foundation of secret-key cryptography, including the work of Horst Feistel, the Data Encryption Standard
Communication Theory of Secrecy Systems
Communication_Theory_of_Secrecy_Systems
Internet routing security framework
using their private key, and verifiable using the public key contained in the corresponding router certificate. The use of cryptographic signing significantly
Resource Public Key Infrastructure
Resource_Public_Key_Infrastructure
Authenticated encryption mode for block ciphers
In cryptography, Galois/Counter Mode (GCM) is a mode of operation for symmetric-key cryptographic block ciphers. The proposal was first published in 2007
Galois/Counter_Mode
Key agreement protocol
elliptic-curve cryptography. The following example illustrates how a shared key is established. Suppose Alice wants to establish a shared key with Bob, but
Elliptic-curve_Diffie–Hellman
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
Computer authentication protocol
Kerberos builds on symmetric-key cryptography and requires a trusted third party, and optionally may use public-key cryptography during certain phases of
Kerberos_(protocol)
Multiparty cryptographic process
Distributed key generation (DKG) is a cryptographic process in which multiple parties contribute to the calculation of a shared public and private key set. Unlike
Distributed_key_generation
Topics referred to by the same term
Look up key or Keys in Wiktionary, the free dictionary. Key, Keys, The Key or The Keys may refer to: Key (cryptography), a piece of information needed
Key
1080/0161-118291857037. "A Short History of Cryptography", Fred Cohen, 1995 "Cryptography Primer", Jose Mari Reyes, 2001 "Cryptography Timeline", Carl Ellison, December
Wadsworth's_cipher
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)
Hybrid encryption in cryptography
using ECIES, Alice needs the following information: The cryptography suite to be used, including a key derivation function (e.g., ANSI-X9.63-KDF with SHA-1
Integrated_Encryption_Scheme
Authenticated encryption with associated data algorithm
IETF. I-D draft-irtf-cfrg-xchacha. "NaCl: Networking and Cryptography library - Secret-key authenticated encryption". Archived from the original on 2009-06-30
ChaCha20-Poly1305
Chinese block cipher
商密4) (formerly SMS4) is a block cipher, standardised for commercial cryptography in China. It is used in the Chinese National Standard for Wireless LAN
SM4_(cipher)
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
Block cipher
Threefish is a symmetric-key tweakable block cipher designed as part of the Skein hash function, an entry in the NIST hash function competition. Threefish
Threefish
Measure of cryptographic strength
In cryptography, security level is a measure of the strength that a cryptographic primitive — such as a cipher or hash function — achieves. Security level
Security_level
Data proving ownership of a public key
In cryptography, a public-key certificate, also known as a digital certificate or identity certificate, is an electronic document used to prove the valid
Public_key_certificate
German cipher machine during World War II
between the keys and the lights with each keypress. In essence, the rotor's motion means every letter is encrypted with a different cryptographic key, making
Enigma_machine
Simple type of polyalphabetic encryption system
theoretically unbreakable. However, in that case, the key, not the cipher, provides cryptographic strength, and such systems are properly referred to collectively
Vigenère_cipher
Technical standard
In cryptography, PKCS #1 is the first of a family of standards called Public-Key Cryptography Standards (PKCS), published by RSA Laboratories. It provides
PKCS_1
Application programming interface
versions. CryptoAPI supports both public-key and symmetric key cryptography, though persistent symmetric keys are not supported. It includes functionality
Microsoft_CryptoAPI
Cryptography practises of the USA's National Security Agency
security information when appropriately keyed. A Type 2 Product refers to an NSA endorsed unclassified cryptographic equipment, assemblies or components for
NSA_cryptography
Applications of cryptography include ATM cards, computer passwords, and electronic commerce. Cryptographer Encryption/decryption Cryptographic key Cipher Ciphertext
Outline_of_cryptography
IEEE standardization project for public-key cryptography
public-key cryptography. It includes specifications for: Traditional public-key cryptography (IEEE Std 1363-2000 and 1363a-2004) Lattice-based public-key cryptography
IEEE_P1363
Key (cryptography) Key size Cryptographic key types Symmetric-key cryptography Public-key cryptography (sometimes called Asymmetric-key cryptography)
List of cybersecurity information technologies
List_of_cybersecurity_information_technologies
Encryption technique
encryption technique that cannot be cracked in cryptography. It requires the use of a single-use pre-shared key that is larger than or equal to the size of
One-time_pad
KEY CRYPTOGRAPHY
KEY CRYPTOGRAPHY
Male
Greek
(Κήυξ) Greek name, possibly KEYX means "kingfisher." In mythology, this is the name of a king of Thessaly, the son of Eosphoros.
Surname or Lastname
English
English : unexplained; possibly a respelling of Kay 6, a shortened form of Scottish and Irish McKay.Korean : There is only one Chinese character and one clan for the Kye family name. According to the Kye family genealogy, the clan was founded by a Ming Dynasty government official named Kye SÅk-son who migrated to KoryÅ and settled in today’s Suan County of Hwanghae Province. The majority of bearers of the Kye family name today live in North Korea.
Boy/Male
Indian
Key
Boy/Male
Muslim/Islamic
Key
Surname or Lastname
English and German
English and German : variant of Kay.Irish : reduced form of McKay.
Male
Japanese
(1-æµ, 2-ä½³, 3-敬, 4-åœ, 5-æ…§) Japanese name KEI means 1) "blessed, lucky," 2) "excellent," 3) "respect," 4) "square jewel," or 5) "wise."
Boy/Male
Muslim
Key
Surname or Lastname
English
English : variant of Nye.Irish : reduced form of O’Ney.North German and Jewish (Ashkenazic) : variant of Neu. The Jewish surname may sometimes be a shortened form of a name such as Neuburger.German : habitational name from a place near Boppard.North German : nickname from Middle Low German ni(g)e, ney(g)e ‘(the) new one’.Dutch : from a short form of the personal name Aarnoud (see Arnold).Dutch (de Ney) : variant of Nay 3.
Male
Japanese
(1-å¥, 2-謙, 3-ç ”) Japanese name KEN means 1) "healthy, strong" or 2) "modest," or 3) "study." Compare with another form of Ken.
Surname or Lastname
English
English : nickname from Middle English ca ‘jackdaw’, from an unattested Old Norse ká. See also Daw.English : nickname from Middle English cai, kay, kei ‘left-handed’, ‘clumsy’.English : metonymic occupational name for a locksmith, from Middle English keye, kaye ‘key’. Compare Care, Kear.English : topographic name for someone living on or near a quay, Middle English kay(e), Old French cay.English : from a Middle English personal name which figures in Arthurian legend. It is found in Old Welsh as Cai, Middle Welsh Kei, and is ultimately from the Latin personal name Gaius.Scottish and Irish : reduced form of McKay.French : variant of Quay, cognate with 2.Much shortened form of any of various names, mostly Eastern European, beginning with the letter K-.Variant of Danish and Frisian Kai.
Boy/Male
Bengali, English, Indian, Sindhi
Key
Male
English
Short form of English Kenneth, KEN means both "born of fire" and "comely; finely made." Also used as a nickname for other names that begin with Ken-. Compare with another form of Ken.
Girl/Female
American, British, Chinese, Dutch, English, Finnish, French, German, Greek, Hebrew, Latin, Scandinavian
Rejoiced; Short Form of Katherine and Other Names Beginning with K; Happy; Pure; Clear; Form of Katherine; Virginal; Keeper of the Keys; Elder Sister
Male
Turkish
Turkish name GÖKER means "man of the sky."
Surname or Lastname
English and Scottish
English and Scottish : variant of Kay.
Boy/Male
Christian, Gaelic, Indian
The One who Opens the Lock
Boy/Male
Indian, Sanskrit, Tamil
Key; Love
Boy/Male
Arabic
Key; Opener
Boy/Male
Gaelic
Son of Aidan.
Boy/Male
Arabic, Muslim
Key; Opener
KEY CRYPTOGRAPHY
KEY CRYPTOGRAPHY
Girl/Female
Hindu, Indian
Princess
Boy/Male
British, English
From the Yew Tree Valley
Boy/Male
German, Greek, Hindu, Indian, Japanese
Myself; Bitter
Boy/Male
African, Hindu, Indian
Frog
Boy/Male
Tamil
Azhagesan | அஜà¯à®¹à®¾à®•à¯‡à®¸à®¨
Girl/Female
Hindu, Indian
Flower
Girl/Female
Biblical
Money, covetousness.
Boy/Male
Hindu, Indian
Messenger of God
Boy/Male
Tamil
Deekshin | திகà¯à®·à¯€à®¨
Initiated, Consecrated
Girl/Female
Tamil
Having conquered
KEY CRYPTOGRAPHY
KEY CRYPTOGRAPHY
KEY CRYPTOGRAPHY
KEY CRYPTOGRAPHY
KEY CRYPTOGRAPHY
n.
An indehiscent, one-seeded fruit furnished with a wing, as the fruit of the ash and maple; a samara; -- called also key fruit.
n.
See Key way, under Key.
n.
See Key, a ledge.
n. pl.
See Kie, Ky, and Kine.
v. t.
To form a key seat, as by cutting. See Key seat, under Key.
a.
Cold as a metallic key; lifeless.
n.
A family of tones whose regular members are called diatonic tones, and named key tone (or tonic) or one (or eight), mediant or three, dominant or five, subdominant or four, submediant or six, supertonic or two, and subtonic or seven. Chromatic tones are temporary members of a key, under such names as " sharp four," "flat seven," etc. Scales and tunes of every variety are made from the tones of a key.
a.
Furnished with keys; as, a keyed instrument; also, set to a key, as a tune.
v. t.
To change the key of.
imp. & p. p.
of Key
n.
A key for opening more locks than one; a master key.
n.
That part of an instrument or machine which serves as the means of operating it; as, a telegraph key; the keys of a pianoforte, or of a typewriter.
n.
A key; a glossary.
v. t.
To fasten or secure firmly; to fasten or tighten with keys or wedges.
n.
A latch key.
n.
A position or condition which affords entrance, control, pr possession, etc.; as, the key of a line of defense; the key of a country; the key of a political situation. Hence, that which serves to unlock, open, discover, or solve something unknown or difficult; as, the key to a riddle; the key to a problem.
n.
A key or scale closely related to another as principal; a relative or attendant key. [R.] See Attendant keys, under Attendant, a.
n.
An instrument which is turned like a key in fastening or adjusting any mechanism; as, a watch key; a bed key, etc.
p. pr. & vb. n.
of Key