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Type of symmetric key cipher
stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream (keystream). In a stream cipher,
Stream_cipher
Stream cipher
(also known as ARC4 or ARCFOUR, meaning Alleged RC4, see below) is a stream cipher. While it is remarkable for its simplicity and speed in software, multiple
RC4
Algorithm for encrypting and decrypting information
blocks of symbols usually of a fixed size (block ciphers), or on a continuous stream of symbols (stream ciphers). By whether the same key is used for both encryption
Cipher
Cryptography algorithm
that do not require padding because they effectively use a block cipher as a stream cipher. Historically, encryption modes have been studied extensively
Block cipher mode of operation
Block_cipher_mode_of_operation
Practice and study of secure communication techniques
known until June 1976. Symmetric key ciphers are implemented as either block ciphers or stream ciphers. A block cipher enciphers input in blocks of plaintext
Cryptography
Algorithm
can use either stream ciphers or block ciphers. Stream ciphers encrypt the digits (typically bytes), or letters (in substitution ciphers) of a message
Symmetric-key_algorithm
Methods to break a stream cipher
Stream ciphers, where plaintext bits are combined with a cipher bit stream by an exclusive-or operation (xor), can be secure if used properly.[citation
Stream_cipher_attacks
Encrypted information
block ciphers or stream ciphers. Block ciphers operate on fixed-length groups of bits, called blocks, with an unvarying transformation. Stream ciphers encrypt
Ciphertext
Simple type of polyalphabetic encryption system
The Vigenère cipher (French pronunciation: [viʒnɛːʁ]) is a method of encrypting alphabetic text where each letter of the plaintext is encoded with a different
Vigenère_cipher
Encryption technique
Google Books. Boneh, Dan. "Attacks on Stream Ciphers and The One Time Pad - Course overview and stream ciphers". Coursera. Retrieved 2022-03-21. "The
One-time_pad
Cipher machines used by the German Army during World War II
The Lorenz SZ40, SZ42a and SZ42b were German rotor stream cipher machines used by the German Army during World War II. They were developed by C. Lorenz
Lorenz_cipher
Stream cipher
Trivium is a synchronous stream cipher designed to provide a flexible trade-off between speed and gate count in hardware, and reasonably efficient software
Trivium_(cipher)
Vladimir; Bogdanov, Andrey; Andrey, Ilya. "ABC: A New Fast Flexible Stream Cipher" (PDF). European Network of Excellence in Cryptology II. Archived from
ABC_(stream_cipher)
Stream cipher
Rabbit is a high-speed stream cipher from 2003. The algorithm and source code was released in 2008 as public domain software. Rabbit was first presented
Rabbit_(cipher)
ZUC is a stream cipher included in the Long Term Evolution standards used in 3GPP specifications for confidentiality and integrity. It is named after
ZUC_stream_cipher
Type of substitution cipher
pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) is a geometric
Pigpen_cipher
Authenticated encryption with associated data algorithm
encryption with associated data (AEAD) algorithm, that combines the ChaCha20 stream cipher with the Poly1305 message authentication code. It has fast software
ChaCha20-Poly1305
Stream ciphers
ChaCha are stream ciphers developed by Daniel J. Bernstein. Salsa20, the original cipher, was designed in 2005, then later submitted to the eSTREAM European
Salsa20
German cipher machine during World War II
The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication
Enigma_machine
Set of algorithms that help secure a network connection
A cipher suite is a set of algorithms that help secure a network connection. Suites typically use Transport Layer Security (TLS) or its deprecated predecessor
Cipher_suite
Process of converting plaintext to ciphertext
Side-channel attacks. For example, RC4, a stream cipher, was cracked due to inherent biases and vulnerabilities in the cipher. In the context of cryptography,
Encryption
Type of cipher
cryptography, a block cipher is a deterministic algorithm that operates on fixed-length groups of bits, called blocks. Block ciphers are the elementary building
Block_cipher
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
Complex Soviet pencil and paper cipher
certainly not as complex or secure as modern computer operated stream ciphers or block ciphers, in practice messages protected by it resisted all attempts
VIC_cipher
Project to identify new stream ciphers for widespread adoption
eSTREAM is a project to "identify new stream ciphers suitable for widespread adoption", organised by the EU ECRYPT network. It was set up as a result
ESTREAM
Turing is a stream cipher developed by Gregory G. Rose and Philip Hawkes at Qualcomm for CDMA. Turing generates 160 bits of output in each round by applying
Turing_(cipher)
Family of block ciphers
Salsa20 is a stream cipher with comparable performance, but it is difficult to use stream ciphers securely in some applications where block ciphers like Speck
Speck_(cipher)
Encryption algorithm used by DVB television standard
distinct ciphers: a block cipher and a stream cipher. When used in encryption mode the data are first encrypted using the 64-bit block cipher in CBC mode
Common_Scrambling_Algorithm
Aspect of WWII Allied intelligence gathering
transmissions that had been enciphered by the Lorenz SZ teleprinter rotor stream cipher attachments. Decrypts of this traffic became an important source of
Cryptanalysis of the Lorenz cipher
Cryptanalysis_of_the_Lorenz_cipher
Simple and widely known encryption technique
A Caesar cipher is one of the simplest and most widely known encryption techniques used in cryptography. It is a type of substitution cipher in which
Caesar_cipher
Hash function that is suitable for use in cryptography
and RadioGatún, output an arbitrarily long stream and can be used as a stream cipher, and stream ciphers can also be built from fixed-length digest hash
Cryptographic_hash_function
Cryptography construction
cryptography, a Feistel cipher (also known as Luby–Rackoff block cipher) is a symmetric structure used in the construction of block ciphers, named after the
Feistel_cipher
Standard for the encryption of electronic data
Standards and Technology (NIST) in 2001. AES is a variant of the Rijndael block cipher developed by two Belgian cryptographers, Joan Daemen and Vincent Rijmen
Advanced_Encryption_Standard
Substitution cipher based on linear algebra
Hill cipher is a polygraphic substitution cipher based on linear algebra. Invented by Lester S. Hill in 1929, it was the first polygraphic cipher in which
Hill_cipher
Encryption method
that securely combining separate confidentiality and authentication block cipher operation modes could be error prone and difficult. This was confirmed by
Authenticated_encryption
Study of analyzing information systems in order to discover their hidden aspects
of Block and Stream Ciphers. IOS Press. ISBN 978-1-60750-844-1. Stamp, Mark; Low, Richard (2007). Applied Cryptanalysis: Breaking Ciphers in the Real World
Cryptanalysis
Type of transposition cipher
The rail fence cipher (also called a zigzag cipher) is a classical type of transposition cipher. It derives its name from the manner in which encryption
Rail_fence_cipher
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
Class of electromechanical encryption devices, used widely from the 1920s to the 1970s
In cryptography, a rotor machine is an electro-mechanical stream cipher device used for encrypting and decrypting messages. Rotor machines were the cryptographic
Rotor_machine
Attacks against common ciphers
This article summarizes publicly known attacks against block ciphers and stream ciphers. Note that there are perhaps attacks that are not publicly known
Cipher_security_summary
Cryptography based on quantum mechanical phenomena
see Quantum readout of PUFs), etc. H. P. Yuen presented Y-00 as a stream cipher using quantum noise around 2000 and applied it for the U.S. Defense
Quantum_cryptography
Free and open-source disk encryption utility
and ciphers, which boost performance on modern central processing units. VeraCrypt employs AES, Serpent, Twofish, Camellia, and Kuznyechik as ciphers. Version
VeraCrypt
Polyalphabetic encryption system
The Beaufort cipher, created by Sir Francis Beaufort, is a substitution cipher similar to the Vigenère cipher, with a slightly modified enciphering mechanism
Beaufort_cipher
1950s cipher machines by Crypto AG
(Hagelin) C-52 and CX-52 were cipher machines manufactured by Crypto AG starting 1951/1952. These pin-and-lug type cipher machines were advanced successors
C-52_(cipher_machine)
Cryptographic protocols for securing data in transit
specification and relegating ClientKeyShare to an appendix Adding the ChaCha20 stream cipher with the Poly1305 message authentication code Adding the Ed25519 and
Transport_Layer_Security
Encryption and decryption method
A book cipher is a cipher in which each word or letter in the plaintext of a message is replaced by some code that locates it in another text, the key
Book_cipher
Early block substitution cipher
The Playfair cipher or Playfair square or Wheatstone–Playfair cipher is a manual symmetric encryption technique and was the first literal digram substitution
Playfair_cipher
Algorithm for public-key cryptography
insecure public-key cipher published in 1997, designed for educational purposes. Kid-RSA gives insight into RSA and other public-key ciphers, analogous to simplified
RSA_cryptosystem
Multiple-substitution writing system cipher
polyalphabetic cipher is a substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though
Polyalphabetic_cipher
Type of substitution cipher
The affine cipher is a type of monoalphabetic substitution cipher, where each letter in an alphabet is mapped to its numeric equivalent, encrypted using
Affine_cipher
Random data used as an additional input to a hash function
Cryptographic nonce Initialization vector Padding "Spice" in the Hasty Pudding cipher Rainbow tables Pepper (cryptography) Fenton, James L.; Grassi, Paul A.;
Salt_(cryptography)
Encryption algorithm
In cryptography, the simple XOR cipher is a type of additive cipher, an encryption algorithm that operates according to the principles: A ⊕ {\displaystyle
XOR_cipher
Computer communications authentication algorithm
Kademlia Mix network Mathematics Cryptographic hash function Block cipher Stream cipher Symmetric-key algorithm Authenticated encryption Public-key cryptography
HMAC
Stream cipher
is a synchronous stream cipher algorithm submitted to the eSTREAM Project of the eCRYPT network. In the final specification the cipher is called ACHTERBAHN-128/80
Achterbahn_(stream_cipher)
English cryptanalyst (1917–1996)
contributions to the team. In 1941, trawlers were captured as well as their cipher equipment and codes. Before this information was obtained, wolf packs had
Joan_Clarke
Input to a cryptographic primitive
ciphertext. In stream cipher encryption uniqueness is crucially important as plaintext may be trivially recovered otherwise. Example: Stream ciphers encrypt
Initialization_vector
Cryptographic attack
$10,000". Stream ciphers, such as RC4, are vulnerable to a bit-flipping attack, as are some block cipher modes of operation. See stream cipher attack. A
Bit-flipping_attack
Block ciphers
The BEAR and LION block ciphers were invented by Ross Anderson and Eli Biham by combining a stream cipher and a cryptographic hash function. The algorithms
BEAR_and_LION_ciphers
Stream cipher
Crypto1 is a proprietary encryption algorithm (stream cipher) and authentication protocol created by NXP Semiconductors for its MIFARE Classic RFID contactless
Crypto-1
Encryption protocol
CipherSaber is a simple symmetric encryption protocol based on the RC4 stream cipher. Its goals are both technical and political: it gives reasonably strong
CipherSaber
Wide-block cipher
Adiantum is a cipher composition for disk encryption. It uses a new cipher construction called HBSH (hash, block cipher, stream cipher, hash), specifically
Adiantum_(cipher)
Block cipher
Blowfish is a symmetric-key block cipher, designed in 1993 by Bruce Schneier and included in many cipher suites and encryption products. Blowfish provides
Blowfish_(cipher)
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
U.S. government cryptographic standard
Kademlia Mix network Mathematics Cryptographic hash function Block cipher Stream cipher Symmetric-key algorithm Authenticated encryption Public-key cryptography
FIPS_140-3
Steganography method
Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. In steganography, a message is
Bacon's_cipher
Cryptographic algorithm
considered incriminating. Furthermore, analysis has revealed flaws in the cipher such that it is now considered insecure. This algorithm uses a standard
Solitaire_(cipher)
Type of functions designed for being unsolvable by root-finding algorithms
erase the key with randomness as soon as randomness is requested. A stream cipher can be converted into a CSPRNG. This has been done with RC4, ISAAC,
Cryptographically secure pseudorandom number generator
Cryptographically_secure_pseudorandom_number_generator
Password-based key derivation function
designed by Niels Provos and David Mazières. It is based on the Blowfish cipher and presented at USENIX in 1999. Besides incorporating a salt to protect
Bcrypt
Cryptographic hash function
a cryptographic hash function based on Daniel J. Bernstein's ChaCha stream cipher, but a permuted copy of the input block, XORed with round constants
BLAKE_(hash_function)
Type of code
used as a basic cipher called the Polybius cipher. This cipher is quite insecure by modern standards, as it is a substitution cipher with characters being
Polybius_square
Key that is easy to break with a specific cipher
problems with weak keys than others, as modern block and stream ciphers do. The first stream cipher machines were also rotor machines and had some of the
Weak_key
Universal hash family used for message authentication in cryptography
authenticated cipher uses a message number i {\displaystyle i} with the XSalsa20 stream cipher to generate a per-message key stream, the first 32 bytes
Poly1305
American cryptographer (1890–1960)
additive polyalphabetic stream cipher and later co-invented an automated one-time pad cipher. Vernam proposed a teleprinter cipher in which a previously
Gilbert_Vernam
Musical algorithm for encrypting and decrypting information
cryptography, a music cipher is an algorithm for the encryption of a plaintext into musical symbols or sounds. Music-based ciphers are related to, but not
Music_cipher
Type of cryptographic attack
Encryption uses the RC4 algorithm, a stream cipher. It is essential that the same key never be used twice with a stream cipher. To prevent this from happening
Related-key_attack
Crypyographic attack method
attack is a stream cipher attack on the widely used RC4 stream cipher. The attack allows an attacker to recover the key in an RC4 encrypted stream from a large
Fluhrer, Mantin and Shamir attack
Fluhrer,_Mantin_and_Shamir_attack
Method in cryptanalysis
monoalphabetic substitution cipher. As such, each column can be attacked with frequency analysis. Similarly, where a rotor stream cipher machine has been used
Kasiski_examination
Family of stream ciphers
SNOW is a family of word-based synchronous stream ciphers developed by Thomas Johansson and Patrik Ekdahl at Lund University. They have a 512-bit linear
SNOW
Substitution cipher
(Hebrew: אתבש; also transliterated Atbaš) is a monoalphabetic substitution cipher originally used to encrypt the Hebrew alphabet. It can be modified for use
Atbash
non-controversial. However, it indirectly prohibits the use of stream ciphers, since stream ciphers require, for their security, that the same initial state
Disk_encryption_theory
Simple encryption method
substitution cipher that replaces a letter with the 13th letter after it in the Latin alphabet. It is a special case of the Caesar cipher which was developed
ROT13
RC2, stream cipher BLOWFISH, CAMELLIA, with x86 and x86_64 assembly optimizations CAST-128 DES and 3DES block ciphers the ChaCha stream cipher, with
Nettle (cryptographic library)
Nettle_(cryptographic_library)
Concept in cryptography
is a block mode that makes a block cipher produce a keystream and thus turns the block cipher into a stream cipher. In this simple example we use the
Keystream
Stream cipher
A5/1 is a stream cipher used to provide over-the-air communication privacy in the GSM cellular telephone standard. It is one of several implementations
A5/1
Polyalphabetic substitution encryption and decryption system
The Alberti cipher, created in 1467 by Italian architect Leon Battista Alberti, was one of the first polyalphabetic ciphers. In the opening pages of his
Alberti_cipher
Family of authenticated ciphers
Ascon is a family of lightweight authenticated ciphers and hash functions that have been selected by the U.S. National Institute of Standards and Technology
Ascon_(cipher)
Stream cipher
a high-speed stream cipher with a built-in single-pass message authentication code (MAC) functionality, submitted in 2004 to the eSTREAM contest by Doug
Phelix
Study of the frequency of letters or groups of letters in a ciphertext
letters in a ciphertext. The method is used as an aid to breaking classical ciphers. Frequency analysis is based on the fact that, in any given stretch of
Frequency_analysis
Block cipher
In cryptography, Skipjack is a block cipher—an algorithm for encryption—developed by the U.S. National Security Agency (NSA). Initially classified, it
Skipjack_(cipher)
French cypher that remained unbroken for several centuries
The Great Cipher (French: Grand chiffre) was a nomenclator cipher developed by the Rossignols, several generations of whom served the French monarchs
Great_Cipher
Type of cipher used in World War I
In cryptography, the ADFGVX cipher was a manually applied field cipher used by the Imperial German Army during World War I. It was used to transmit messages
ADFGVX_cipher
Stream cipher
In cryptography, SEAL (Software-Optimized Encryption Algorithm) is a stream cipher optimised for machines with a 32-bit word size and plenty of RAM with
SEAL_(cipher)
Approach to public-key cryptography
August 2015, the NSA announced that it planned to replace Suite B with a new cipher suite due to concerns about quantum computing attacks on ECC. NSA later
Elliptic-curve_cryptography
Surveillance strategy
Kademlia Mix network Mathematics Cryptographic hash function Block cipher Stream cipher Symmetric-key algorithm Authenticated encryption Public-key cryptography
Harvest_now,_decrypt_later
Classic polyalphabet encryption system
An autokey cipher (also known as the autoclave cipher) is a cipher that incorporates the message (the plaintext) into the key. The key is generated from
Autokey_cipher
Set of cryptographic hash functions
including a stream cipher, an authenticated encryption system, a "tree" hashing scheme for faster hashing on certain architectures, and AEAD ciphers Keyak and
SHA-3
Cryptography standard
Kademlia Mix network Mathematics Cryptographic hash function Block cipher Stream cipher Symmetric-key algorithm Authenticated encryption Public-key cryptography
PKCS_7
Form of cryptanalysis
affine approximations to the action of a cipher. Attacks have been developed for block ciphers and stream ciphers. Linear cryptanalysis is one of the two
Linear_cryptanalysis
Topics referred to by the same term
to small amounts of carbon dioxide added to wine Spritz (cipher), a cryptographic stream cipher and hash function by Rivest and Schuldt. Spritzer Spritzgebäck
Spritz
Cipher algorithm
Dragon is a stream cipher developed at the Information Security Institute by William Millan with some help from Ed Dawson, Kevin Chen, Matt Henricksen
Dragon_(cipher)
STREAM CIPHER
STREAM CIPHER
Boy/Male
Indian
Stream
Boy/Male
Tamil
Stream
Surname or Lastname
English
English : habitational name from any of the various places, for example in Hertfordshire, Kent, and Somerset, so named from Old English strǣt ‘paved highway’, ‘Roman road’ (Latin strata (via)). In the Middle Ages the word at first denoted a Roman road but later also came to denote the main street in a town or village, and so the surname may also have been a topographic name for someone who lived on a main street.Jewish : Americanized form of the Sephardic surname Chetrit, of uncertain origin.Americanized form of Ashkenazic Jewish Strasser and a number of other similar surnames.The Rev. Nicholas Street (1603–74) came from England to Taunton, MA, between 1630 and 1638, and later moved to New Haven, CT, where his descendant Augustus Russell Street, a leader in art education, was born in 1791 and went on to become one of the most important early benefactors of Yale College.
Surname or Lastname
English
English : topographic name for someone who lived beside a stream, Middle English streme.Americanized form of Swedish Ström or Danish Strøm (see Strom).
Girl/Female
English
Stream.
Boy/Male
Czech, Czechoslovakian, German
Tree; Stream
Girl/Female
Indian
Stream.
Boy/Male
Australian, Celtic, Dutch, Scottish
Stream
Girl/Female
English
Stream.
Girl/Female
Gujarati, Hindu, Indian
Stream
Girl/Female
Hindu
Stream
Boy/Male
Hindu
Stream
Surname or Lastname
English
English : variant spelling of Street.
Surname or Lastname
English
English : nickname from Middle English streit ‘narrow’, ‘strict’ (Anglo-Norman French estreit).German and Jewish (Ashkenazic) : nickname for a quarrelsome person, from Middle High German strīt, German Streit ‘strife’, ‘argument’.
Surname or Lastname
English (chiefly Nottinghamshire)
English (chiefly Nottinghamshire) : from Old English strēaw, hence a metonymic occupational name for a dealer in straw, or a nickname for an exceptionally thin man or someone with straw-colored hair.
Boy/Male
English
White stream; holy stream.
Girl/Female
Anglo Saxon
Stream.
Boy/Male
Muslim
Stream
Surname or Lastname
English
English : unexplained.Norwegian : habitational name from a farmstead in Agder named Strai, of uncertain derivation.
Girl/Female
Tamil
Stream
STREAM CIPHER
STREAM CIPHER
Girl/Female
Indian
Axis
Girl/Female
Hindu
Cloud, River ganges
Girl/Female
Australian, Gaelic
Slender; From the Forest; Similar to Caley or Cailley
Boy/Male
Hindu
Desire
Boy/Male
Indian, Sanskrit
Sky Jewel; Sun
Boy/Male
Hindu, Indian, Tamil
Sun
Boy/Male
English American Biblical Hebrew
Son of a farmer. Both surname and given name.
Biblical
sleep; a sacrifice of myrrh; ascension
Surname or Lastname
English
English : habitational name from either of two places, in Norfolk and Suffolk, named Brettenham, from Old English Bretta ‘of the Britons’ (genitive of Brettas) + tūn ‘farmstead’.
Boy/Male
Indian
Brightness; The One who Likes to Travel a Lot
STREAM CIPHER
STREAM CIPHER
STREAM CIPHER
STREAM CIPHER
STREAM CIPHER
v. i.
To move or travel by the agency of steam.
v. i.
To emit steam or vapor.
a.
Resembling a stream; issuing in a stream.
v. i.
To extend; to stretch out with a wavy motion; to float in the wind; as, a flag streams in the wind.
n.
Current; drift; tendency; series of tending or moving causes; as, the stream of opinions or manners.
n.
Anything issuing or moving with continued succession of parts; as, a stream of words; a stream of sand.
n.
A current of water or other fluid; a liquid flowing continuously in a line or course, either on the earth, as a river, brook, etc., or from a vessel, reservoir, or fountain; specifically, any course of running water; as, many streams are blended in the Mississippi; gas and steam came from the earth in streams; a stream of molten lead from a furnace; a stream of lava from a volcano.
v. i.
To generate steam; as, the boiler steams well.
v. i.
To issue or flow in a stream; to flow freely or in a current, as a fluid or whatever is likened to fluids; as, tears streamed from her eyes.
v. t.
To spread or scatter. See Strew, and Strow.
a.
Abounding with streams, or with running water; streamful.
v. t.
To send forth in a current or stream; to cause to flow; to pour; as, his eyes streamed tears.
n.
A continued current or course; as, a stream of weather.
v. i.
To issue in a stream of light; to radiate.
v. t.
To strew; to scatter over a surface; as, to spread manure; to spread lime on the ground.
n.
A searcher for stream tin.
imp. & p. p.
of Stream
v. t.
To expose to the action of steam; to apply steam to for softening, dressing, or preparing; as, to steam wood; to steamcloth; to steam food, etc.
v. i.
To pour out, or emit, a stream or streams.
a.
Consisting of, or resembling, steam; full of steam; vaporous; misty.