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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)
Cryptography construction
function, Skipjack is a modified Feistel cipher using a Feistel network in its G permutation, and Threefish (part of Skein) is a non-Feistel block cipher that
Feistel_cipher
Cipher
of the code which suggested it might be leaked source code for the Skipjack cipher, which was still classified at the time. However once David Wagner
S-1_block_cipher
Topics referred to by the same term
Skipjack, the name of three United States Navy submarines Skipjack class submarine, a class of United States Navy nuclear submarines Skipjack (cipher)
Skipjack
Algorithm
ChaCha20, Blowfish, CAST5, Kuznyechik, RC4, DES, 3DES, Skipjack, Safer, and IDEA. Symmetric ciphers are commonly used to achieve other cryptographic primitives
Symmetric-key_algorithm
Practice and study of secure communication techniques
The cipher algorithm (called Skipjack) was then classified (declassified in 1998, long after the Clipper initiative lapsed). The classified cipher caused
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
Block cipher mode of operation
Block_cipher_mode_of_operation
Early unclassified symmetric-key block cipher
Force: Cracking the Data Encryption Standard DES supplementary material Skipjack (cipher) Triple DES Diffie, Whitfield; Hellman, Martin E. (June 1977). "Exhaustive
Data_Encryption_Standard
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
U.S. signals intelligence organization
government, and NSA ultimately declassified and published the design of the Skipjack cipher used on the cards. NSA promoted the inclusion of a random number generator
National_Security_Agency
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)
Block cipher
state of the art ciphers such as AES. Skipjack (cipher) "Chiasmus for Windows". www.ia.nato.int. Retrieved 19 May 2023. "Chiasmus (cipher)". memim.com. Retrieved
Chiasmus_(cipher)
Code name of a decryption program run by the NSA
decrypt later". Through the NSA-designed Clipper chip, which used the Skipjack cipher with an intentional backdoor, and using various specifically designed
Bullrun_(decryption_program)
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
Newsgroup relevant to the discussion of cryptography and related issues
Others have been hoaxes: Iraqi block cipher and S-1, the latter an alleged description of the (then-secret) Skipjack cipher. The group is also the origin of
Cryptography_newsgroups
Block cipher
Algorithm (TDEA or Triple DEA), is a symmetric-key block cipher, which applies the DES cipher algorithm three times to each data block. The 56-bit key
Triple_DES
Block cipher
In cryptography, the Tiny Encryption Algorithm (TEA) is a block cipher notable for its simplicity of description and implementation, typically a few lines
Tiny_Encryption_Algorithm
Twofish Serpent Camellia Salsa20 ChaCha20 Blowfish CAST5 Kuznyechik RC4 3DES Skipjack Safer IDEA Advanced Encryption Standard, also known as AES and Rijndael
List_of_cryptosystems
Input to a cryptographic primitive
between (potentially similar) segments of the encrypted message. For block ciphers, the use of an IV is described by the modes of operation. Some cryptographic
Initialization_vector
Form of cryptanalaysis
technique has been applied to SAFER, IDEA, Skipjack, E2, Twofish, Camellia, CRYPTON, and even the stream cipher Salsa20. Lars Knudsen (1994). Truncated and
Truncated differential cryptanalysis
Truncated_differential_cryptanalysis
Block cipher
In cryptography, MAGENTA is a symmetric key block cipher developed by Michael Jacobson Jr. and Klaus Huber for Deutsche Telekom. The name MAGENTA is an
MAGENTA
Block cipher
Serpent is a symmetric key block cipher that was a finalist in the Advanced Encryption Standard (AES) contest, in which it ranked second to Rijndael. Serpent
Serpent_(cipher)
Simple public-key infrastructure • Simple XOR cipher • S/KEY • Skein (hash function) • Skipjack (cipher) • Slide attack • Slidex • Small subgroup confinement
Index of cryptography articles
Index_of_cryptography_articles
Chinese block cipher
ShāngMì 4 (SM4, 商密4) (formerly SMS4) is a block cipher, standardised for commercial cryptography in China. It is used in the Chinese National Standard
SM4_(cipher)
Cryptographic algorithm
PRESENT is a lightweight block cipher, developed by Orange Labs (France), Ruhr University Bochum (Germany) and the Technical University of Denmark in 2007
PRESENT
Block cipher
3-Way is a block cipher designed in 1994 by Joan Daemen. It is closely related to BaseKing; the two are variants of the same general cipher technique. 3-Way
3-Way
Type of cryptanalytic attack
cryptanalysis have since been applied to a variety of ciphers, including Hierocrypt, IDEA, Camellia, Skipjack, MISTY1, MISTY2, SAFER++, KHAZAD, and FOX (now
Integral_cryptanalysis
Exploitation of impossible differences in block ciphers
of 8.5 rounds of IDEA and 31 out of 32 rounds of the NSA-designed cipher Skipjack. This development led cryptographer Bruce Schneier to speculate that
Impossible differential cryptanalysis
Impossible_differential_cryptanalysis
Block cipher
In cryptography, Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits. It was one of the five finalists of
Twofish
Block cipher
In cryptography, KHAZAD is a block cipher designed by Paulo S. L. M. Barreto together with Vincent Rijmen, one of the designers of the Advanced Encryption
KHAZAD
Block cipher
block cipher designed by Ron Rivest in 1987. "RC" stands for "Ron's Code" (see also RC2, RC5 and RC6), but generally called simply RC2. Other ciphers designed
RC2
Block cipher
In cryptography, SHARK is a block cipher identified as one of the predecessors of Rijndael (the Advanced Encryption Standard). SHARK has a 64-bit block
SHARK
Authenticated encryption mode
Mode (GCM) is a mode of operation for symmetric-key cryptographic block ciphers that provides both encryption and message authentication in a single pass
Galois/Counter_Mode
Block cipher
cryptography, XTEA (eXtended TEA) is a block cipher designed to correct weaknesses in TEA. The cipher's designers were David Wheeler and Roger Needham
XTEA
Block cipher
cryptography, Corrected Block TEA (often referred to as XXTEA) is a block cipher designed to correct weaknesses in the original Block TEA. XXTEA is vulnerable
XXTEA
Block cipher
KASUMI is a block cipher used in UMTS, GSM, and GPRS mobile communications systems. In UMTS, KASUMI is used in the confidentiality (f8) and integrity algorithms
KASUMI
Block cipher
In cryptography, RC5 is a symmetric-key block cipher notable for its simplicity. Designed by Ronald Rivest in 1994, According to Ron Rivest, RC stands
RC5
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)
Block cipher
In cryptography, RC6 is a symmetric key block cipher derived from RC5. It was designed by Ron Rivest, Matt Robshaw, Ray Sidney, and Yiqun Lisa Yin to meet
RC6
Block cipher
BATON is a Type 1 block cipher in use since at least 1995 by the United States government to secure classified information. While the BATON algorithm itself
BATON
Block cipher
(Russian for 'Grasshopper'; Cyrillic script: Кузнечик) is a symmetric block cipher. It has a block size of 128 bits and key length of 256 bits. It is defined
Kuznyechik
Earliest civilian block ciphers
Lucifer was the name given to several of the earliest civilian block ciphers, developed by Horst Feistel and his colleagues at IBM. Lucifer was a direct
Lucifer_(cipher)
Japanese cryptography research project
CRYPTREC included certain 64-bit block ciphers in its recommended list, while NESSIE did not select any 64-bit block ciphers in its final portfolio. Similarly
CRYPTREC
Block cipher
cryptography, the Cellular Message Encryption Algorithm (CMEA) is a block cipher which was used for securing mobile phones in the United States. CMEA is
Cellular Message Encryption Algorithm
Cellular_Message_Encryption_Algorithm
Family of block ciphers
Speck is part of a family of lightweight block ciphers publicly released by the National Security Agency (NSA) in June 2013. Speck has been optimized
Speck_(cipher)
Basic component of symmetric key algorithms
component of symmetric key algorithms which performs substitution. In block ciphers, they are typically used to obscure the relationship between the key and
S-box
Block cipher
Kalyna (Ukrainian: Калина, Viburnum opulus) is a symmetric block cipher. It supports block sizes of 128, 256 or 512 bits; the key length is either equal
Kalyna_(cipher)
Republic of Korea national standard block cipher
Lightweight Encryption Algorithm (also known as LEA) is a 128-bit block cipher developed by South Korea in 2013 to provide confidentiality in high-speed
LEA_(cipher)
Soviet/Russian national standard block cipher
GOST block cipher (Magma), defined in the standard GOST 28147-89, is a Soviet and Russian government standard symmetric key block cipher with a block
GOST_(block_cipher)
Block cipher designed in 2000 by Chang-Hyi Lee
In cryptography, Zodiac is a block cipher designed in 2000 by Chang-Hyi Lee for the Korean firm SoftForum. Zodiac uses a 16-round Feistel network structure
Zodiac_(cipher)
Number of bits in a key used by a cryptographic algorithm
the number of bits in a key used by a cryptographic algorithm (such as a cipher). Key length defines the upper-bound on an algorithm's security (i.e. a
Key_size
Block cipher
MARS is a block cipher that was IBM's submission to the Advanced Encryption Standard process. MARS was selected as an AES finalist in August 1999, after
MARS_(cipher)
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
Feistel network based block cipher
In cryptography, Camellia is a symmetric key block cipher with a block size of 128 bits and key sizes of 128, 192 and 256 bits. It was jointly developed
Camellia_(cipher)
Block cipher
In cryptography, MacGuffin is a block cipher created in 1994 by Bruce Schneier and Matt Blaze at a Fast Software Encryption workshop. It was intended as
MacGuffin_(cipher)
Block cipher
SEED is a block cipher developed by the Korea Information Security Agency (KISA). It is used broadly throughout South Korean industry, but seldom found
SEED
Authenticated encryption mode for block ciphers
(counter with cipher block chaining message authentication code; counter with CBC-MAC) is a mode of operation for cryptographic block ciphers. It is an authenticated
CCM_mode
Block cipher invented by Joan Daemen and Vincent Rijmen
In cryptography, Square (sometimes written SQUARE) is a block cipher invented by Joan Daemen and Vincent Rijmen. The design, published in 1997, is a forerunner
Square_(cipher)
Concept in cryptography
is the desirable property of cryptographic algorithms, typically block ciphers and cryptographic hash functions, wherein if an input is changed slightly
Avalanche_effect
Symmetric-key block cipher
Improved Proposed Encryption Standard (IPES), is a symmetric-key block cipher designed by James Massey of ETH Zurich and Xuejia Lai and was first described
International Data Encryption Algorithm
International_Data_Encryption_Algorithm
Adding data to a message prior to encryption to hide its length
report, Sincerely yours, etc. The primary use of padding with classical ciphers is to prevent the cryptanalyst from using that predictability to find known
Padding_(cryptography)
Block cypher operating mode
The xor–encrypt–xor (XEX) is a (tweakable) mode of operation of a block cipher. In tweaked-codebook mode with ciphertext stealing (XTS mode), it is one
Xor–encrypt–xor
Cipher design construction
network (SPN), is a series of linked mathematical operations used in block cipher algorithms such as AES (Rijndael), 3-Way, Kalyna, Kuznyechik, PRESENT, SAFER
Substitution–permutation network
Substitution–permutation_network
Block cipher
In cryptography, MESH is a block cipher designed in 2002 by Jorge Nakahara, Jr., Vincent Rijmen, Bart Preneel, and Joos Vandewalle. MESH is based directly
MESH_(cipher)
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
Cryptographic algorithm
cryptography, ciphertext stealing (CTS) is a general method of using a block cipher mode of operation that allows for processing of messages that are not evenly
Ciphertext_stealing
Classified National Security Agency Type 1 encryption algorithm
Mode (also known as Key-Auto-KEY or KAK) and Autoclave Mode (also known as Cipher-Text Auto Key or CTAK). On the AIM microchip, it runs at 4% of the clock
SAVILLE
Block cipher
(alternatively CAST5) is a symmetric-key block cipher used in a number of products, notably as the default cipher in some versions of GPG and PGP. It has also
CAST-128
Implementations of Advanced Encryption Standard
of the cipher identifies the number of null bytes of padding added. Careful choice must be made in selecting the mode of operation of the cipher. The simplest
AES_implementations
Block cipher
Prince is a block cipher targeting low latency, unrolled hardware implementations. It is based on the so-called FX construction. Its most notable feature
Prince_(cipher)
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
In cryptography, Nimbus is a block cipher invented by Alexis Machado in 2000. It was submitted to the NESSIE project, but was not selected. The algorithm
Nimbus_(cipher)
Block ciphers
In cryptography, Khufu and Khafre are two block ciphers designed by Ralph Merkle in 1989 while working at Xerox's Palo Alto Research Center. Along with
Khufu_and_Khafre
Block cipher
In cryptography, CRYPTON is a symmetric block cipher submitted as a candidate for the Advanced Encryption Standard (AES). It is very efficient in hardware
CRYPTON
Type of cipher
In cryptography, a product cipher combines two or more transformations in a manner intending that the resulting cipher is more secure than the individual
Product_cipher
Block cipher
cryptography, the IDEA NXT algorithm (previously known as FOX) is a block cipher designed by Pascal Junod and Serge Vaudenay of EPFL (Lausanne, Switzerland)
IDEA_NXT
General form of cryptanalysis applicable primarily to block ciphers
general form of cryptanalysis applicable primarily to block ciphers, but also to stream ciphers and cryptographic hash functions. In the broadest sense,
Differential_cryptanalysis
Block cipher
In cryptography, FEAL (the Fast data Encipherment Algorithm) is a block cipher proposed as an alternative to the Data Encryption Standard (DES), and designed
FEAL
Authenticated encryption mode for block ciphers
(encrypt-then-authenticate-then-translate) is a mode of operation for cryptographic block ciphers. It is an Authenticated Encryption with Associated Data (AEAD) algorithm
EAX_mode
Family of block ciphers
LOKI91 are symmetric-key block ciphers designed as possible replacements for the Data Encryption Standard (DES). The ciphers were developed based on a body
LOKI
Block cipher
The Hasty Pudding cipher (HPC) is a variable-block-size block cipher designed by Richard Schroeppel, which was an unsuccessful candidate in the competition
Hasty_Pudding_cipher
Block cipher
In cryptography, ARIA is a block cipher designed in 2003 by a large group of South Korean researchers. In 2004, the Korean Agency for Technology and Standards
ARIA_(cipher)
Israeli computer scientist, cryptographer
University of Luxembourg. His notable work includes the design of the stream cipher LEX, as well as the cryptanalysis of numerous cryptographic primitives.
Alex_Biryukov
Block cipher
DES Scheme (GDES or G-DES) is a variant of the DES symmetric-key block cipher designed with the intention of speeding up the encryption process while
GDES
Family of lightweight block ciphers
Simon is a family of lightweight block ciphers publicly released by the National Security Agency (NSA) in June 2013. Simon has been optimized for performance
Simon_(cipher)
Authenticated encryption mode for block ciphers
In cryptography, CWC Mode (Carter–Wegman + CTR mode) is an AEAD block cipher mode of operation that provides both encryption and built-in message integrity
CWC_mode
Authenticated encryption mode for block ciphers
parallelizable mode (IAPM) is a mode of operation for cryptographic block ciphers. As its name implies, it allows for a parallel mode of operation for higher
IAPM_(mode)
Block cipher
In cryptography, M8 is a block cipher designed by Hitachi in 1999. It is a modification of Hitachi's earlier M6 algorithm, designed for greater security
M8_(cipher)
Block cipher
Anubis is a block cipher designed by Vincent Rijmen and Paulo S. L. M. Barreto as an entrant in the NESSIE project, a former research program initiated
Anubis_(cipher)
Aspect of US National Security Agency
Rivest. Digital Signature Algorithm Data Encryption Standard (DES) Skipjack: the cipher developed for Clipper and finally published in 1998. Clipper chip:
NSA_encryption_systems
Danish cryptologist, computer scientist (born 1962)
hash functions, and a couple of block ciphers: DES, DFC, IDEA, ICE, LOKI, MISTY, RC2, RC5, RC6, SC2000, Skipjack, Square and SAFER.[citation needed] Knudsen
Lars_Ramkilde_Knudsen
Block cipher
CLEFIA is a proprietary block cipher algorithm, developed by Sony. Its name is derived from the French word clef, meaning "key". The block size is 128-bits
CLEFIA
Cryptanalytic method for unauthorized users to access data
technologies have proven their capability in the brute-force attack of certain ciphers. One is modern graphics processing unit (GPU) technology,[page needed]
Brute-force_attack
Block cipher
In cryptography, NewDES is a symmetric key block cipher. It was created in 1984–1985 by Robert Scott as a potential DES replacement. Despite its name,
NewDES
Cryptographic attack
Cryptomeria/C2 CRYPTON CS-Cipher DEAL DES-X DFC E2 FEAL FEA-M FROG G-DES Grand Cru Hasty Pudding cipher Hierocrypt ICE IDEA NXT Intel Cascade Cipher Iraqi Kalyna KASUMI
Timing_attack
Block cipher
In cryptography, BassOmatic is the symmetric-key cipher designed by Phil Zimmermann as part of his email encryption software PGP (in the first release
BassOmatic
Cryptography practises of the USA's National Security Agency
that it is planning to transition "in the not distant future" to a new cipher suite that is resistant to quantum attacks. "Unfortunately, the growth of
NSA_cryptography
Block cipher
KeeLoq is a proprietary hardware-dedicated block cipher that uses a non-linear feedback shift register (NLFSR). The uni-directional command transfer protocol
KeeLoq
Block cipher
In cryptography, UES (Universal Encryption Standard) is a block cipher designed in 1999 by Helena Handschuh and Serge Vaudenay. They proposed it as a transitional
UES_(cipher)
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
SKIPJACK CIPHER
SKIPJACK CIPHER
SKIPJACK CIPHER
SKIPJACK CIPHER
Boy/Male
Tamil
Naagadatha | நாகதாதா
One of the kauravas
Girl/Female
Arabic, Muslim
Royal
Girl/Female
Arabic, Muslim
Gratitude; Thankfulness
Surname or Lastname
English and Welsh
English and Welsh : from the medieval personal name Elis, a vernacular form of Elijah (see Elias). In Wales this surname absorbed forms derived from the Welsh personal name Elisedd, a derivative of elus ‘kindly’, ‘benevolent’.
Male
Esperanto
Variant spelling of Esperanto Michaelo, MIHHAELO means "who is like God?"
Girl/Female
American, Australian, Chinese, Christian, German, Hebrew
A Bee; Form of Deborah
Surname or Lastname
English
English : variant of Boniface.
Girl/Female
Arabic
Unblemished
Female
African
rest in wealth.
Girl/Female
Scandinavian
Abbreviation of Katherine. Pure.
SKIPJACK CIPHER
SKIPJACK CIPHER
SKIPJACK CIPHER
SKIPJACK CIPHER
SKIPJACK CIPHER
n.
A combination or interweaving of letters, as the initials of a name; a device; a monogram; as, a painter's cipher, an engraver's cipher, etc. The cut represents the initials N. W.
a.
Of the nature of a cipher; of no weight or influence.
n.
An elater; a snap bug, or snapping beetle.
n.
The common snipe.
n.
A name given to several kinds of a fish, as the common bluefish, the alewife, the bonito, the butterfish, the cutlass fish, the jurel, the leather jacket, the runner, the saurel, the saury, the threadfish, etc.
n.
A food fish (Elagatis pinnulatus) of Florida and the West Indies; -- called also skipjack, shoemaker, and yellowtail. The name alludes to its rapid successive leaps from the water.
v. t.
To get by ciphering; as, to cipher out the answer.
p. pr. & vb. n.
of Cipher
n.
A flat batter cake cooked on a griddle; a flapjack; a griddlecake.
n.
A slender marine fish (Scomberesox saurus) of Europe and America. It has long, thin, beaklike jaws. Called also billfish, gowdnook, gawnook, skipper, skipjack, skopster, lizard fish, and Egypt herring.
n.
The skipjack (Sarda Mediterranea) of the Atlantic, an important and abundant food fish on the coast of the United States, and (S. Chilensis) of the Pacific, and other related species. They are large and active fishes, of a blue color with black oblique stripes.
n.
A yellow carangoid fish of the Atlantic and Gulf coasts (Caranx chrysos), most abundant southward, where it is valued as a food fish; -- called also hardtail, horse crevalle, jack, buffalo jack, skipjack, yellow mackerel, and sometimes, improperly, horse mackerel. Other species of Caranx (as C. fallax) are also sometimes called jurel.
n.
An American fresh-water fish (Ictiobus, / Carpiodes, cyprinus); -- called also carp sucker, sailfish, spearfish, and skimback.
n.
A shallow sailboat with a rectilinear or V-shaped cross section.
n.
The quillback.
n.
One who ciphers.
n.
Any carangoid fish of the genus Trachurus, especially T. trachurus, or T. saurus, of Europe and America, and T. picturatus of California. Called also skipjack, and horse mackerel.
n.
An upstart.
imp. & p. p.
of Cipher
n.
A large voracious fish (Pomatomus saitatrix), of the family Carangidae, valued as a food fish, and widely distributed on the American coast. On the New Jersey and Rhode Island coast it is called the horse mackerel, in Virginia saltwater tailor, or skipjack.