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Cryptographic primitive
a one-way compression function is a function that transforms two fixed-length inputs into a fixed-length output. The transformation is "one-way", meaning
One-way_compression_function
Function used in computer cryptography
computer science Do one-way functions exist? More unsolved problems in computer science In computer science, a one-way function is a function that is easy to
One-way_function
Hash function that is suitable for use in cryptography
one-way compression function. The compression function can either be specially designed for hashing or be built from a block cipher. A hash function built
Cryptographic_hash_function
Method of building collision-resistant cryptographic hash functions
Merkle–Damgård hash function is a method of building collision-resistant cryptographic hash functions from collision-resistant one-way compression functions. This construction
Merkle–Damgård_construction
Topics referred to by the same term
digital images Video compression One-way compression function, a cryptographic primitive Brain compression, a medical condition Compression bandage Pressing
Compression
Index of articles associated with the same name
signal compression include: Bandwidth compression Data compression Dynamic range compression Gain compression Image compression Lossy compression One-way compression
Signal_compression
Set of cryptographic hash functions
They are built using the Merkle–Damgård construction, from a one-way compression function itself built using the Davies–Meyer structure from a specialized
SHA-2
Merkle–Damgård construction N-Hash Negative-acknowledge character One-way compression function Parity bit Pearson hashing Perfect code Quantum fingerprinting
List of algebraic coding theory topics
List_of_algebraic_coding_theory_topics
Cryptographic hash function
identical. Tiger is based on Merkle–Damgård construction. The one-way compression function operates on 64-bit words, maintaining 3 words of state and processing
Tiger_(hash_function)
Algorithm
standard. Another application is to build hash functions from block ciphers. See one-way compression function for descriptions of several such methods. Many
Symmetric-key_algorithm
Cryptography algorithm
which use a block cipher to build a cryptographic hash function. See one-way compression function for descriptions of several such methods. Cryptographically
Block cipher mode of operation
Block_cipher_mode_of_operation
Basic cryptographic algorithm used to build cryptographic protocols
OpenSSL vulnerability news page here. One-way hash function, sometimes also called as one-way compression function—compute a reduced hash value for a message
Cryptographic_primitive
Compression method for digital images
iterated function systems. Fractal image compression has many similarities to vector quantization image compression. With fractal compression, encoding
Fractal_compression
Data compression approach allowing perfect reconstruction of the original data
Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of
Lossless_compression
Message authentication code algorithm
(MACs). One-way compression function – Hash functions can be made from block ciphers. But note, there are significant differences in function and uses
CBC-MAC
Type of cipher
stream cipher. Cryptographic hash functions can be built using block ciphers. See the one-way compression function for descriptions of several such methods
Block_cipher
Method for the construction of fractals
(partitioned iterated function systems), also called local iterated function systems, give surprisingly good image compression, even for photographs that
Iterated_function_system
Means of compressing an executable file
Executable compression is any means of compressing an executable file and combining the compressed data with decompression code into a single executable
Executable_compression
Mapping arbitrary data to fixed-size values
collision). Hash functions are related to (and often confused with) checksums, check digits, fingerprints, lossy compression, randomization functions, error-correcting
Hash_function
Obsolete cryptographic hash function
applications of the compression function. The author concludes, "MD2 can no longer be considered a secure one-way hash function". In 2008, MD2 has further
MD2_(hash_function)
Audio signal processing technique
The chirp pulse compression process transforms a long duration frequency-coded pulse into a narrow pulse of greatly increased amplitude. It is a technique
Chirp_compression
Audio signal processing operation
software. In recorded and live music, compression parameters may be adjusted to change the way they affect sounds. Compression and limiting are identical in process
Dynamic_range_compression
Compression garment
Compression stockings Compression stockings are a specialized hosiery designed to help prevent the occurrence of, and guard against further progression
Compression_stockings
Cryptographic hash function
European patent was granted so MDC-2 can now be freely used. One-way compression function Steinberger, John (June 23, 2007). "The Collision Intractability
MDC-2
high enough, it can interrupt the normal flow of blood. For compression to affect nerve function, pressure needs to be applied non-uniformly. For example
Pathophysiology of nerve entrapment
Pathophysiology_of_nerve_entrapment
Lamp with an adjustable balanced folding arm
same size; one spring has to lift more weight but is more vertical. The other spring lifts less weight but is more horizontal. One compression spring controls
Balanced-arm_lamp
Cryptographic hash function
possible. It is consistently a few times faster than BLAKE2. The BLAKE3 compression function is closely based on that of BLAKE2s, with the biggest difference
BLAKE_(hash_function)
Symptoms resulting from chronic, direct pressure on a peripheral nerve
root compression (by a herniated disc, for example). Its symptoms include pain, tingling, numbness and muscle weakness. The symptoms affect just one particular
Nerve_compression_syndrome
Family of archive file formats used by 7-Zip
the SHA-256 hash function. The SHA-256 is executed 219 (524288) times, which causes a significant delay on slow PCs before compression or extraction starts
7z
Lossless data compression
PackBits is a fast, simple lossless compression scheme for run-length encoding of data. Apple introduced the PackBits format with the release of MacPaint
PackBits
Computer communications authentication algorithm
hash function (one that uses the Merkle–Damgård construction) breaks up a message into blocks of a fixed size and iterates over them with a compression function
HMAC
Measure of similarity
Normalized compression distance (NCD) is a way of measuring the similarity between two objects, be it two documents, two letters, two emails, two music
Normalized compression distance
Normalized_compression_distance
Lossless, but memory-consuming, data compression algorithm
Re-Pair (short for recursive pairing) is a grammar-based compression algorithm that, given an input text, builds a straight-line program, i.e. a context-free
Re-Pair
Entropy coding methods
University, used in data compression since 2014 due to improved performance compared to previous methods. ANS combines the compression ratio of arithmetic
Asymmetric_numeral_systems
cryptograph • OMNI (SCIP) • One-key MAC • One-time pad • One-time password • One-way compression function • One-way function • Onion routing • Online Certificate
Index of cryptography articles
Index_of_cryptography_articles
Family of cryptographic hash functions
hash functions and uses quite a lot of memory, which makes it impractical on memory constrained environments. Furthermore, the compression function used
Fast_syndrome-based_hash
Lossless compression algorithm
LZMA (Lempel–Ziv–Markov chain algorithm) is a lossless data compression algorithm developed since 1998 by Igor Pavlov, the developer of 7-Zip. It has
LZMA
Data compression technique
codeword (and therefore the compression rate). In many compression algorithms, the ranking is equivalent to probability mass function estimation. Given the
Prediction by partial matching
Prediction_by_partial_matching
Lossless data compression scheme
theory, an entropy coding (or entropy encoding) is any lossless data compression method that attempts to approach the lower bound declared by Shannon's
Entropy_coding
Circular steel spring
oil seals, shaft seals, belt-driven motors, and electrical connectors. Compression garter springs exert outward radial forces, while extension garter springs
Garter_spring
Malicious archive file designed to disrupt the program or system reading it
achieve their extreme compression ratios. Dynamic programming methods can be employed to limit traversal of such files, so that only one file is followed recursively
Zip_bomb
Algorithm used in data compression
as a preparatory step to improve the efficiency of a compression algorithm, and is used this way in software such as bzip2. The algorithm can be implemented
Burrows–Wheeler_transform
Elastic object that stores mechanical energy
respect to displacement – approximates a linear function. The force of a fully compressed compression coil spring is: F m a x = E d 4 ( L − n d ) 16 (
Spring_(device)
data compression well suited for image compression (sometimes also video compression and audio compression) Transform coding: type of data compression for
List_of_algorithms
Lossy and lossless image format
used either for lossless image compression, similar to PNG, or as a means to achieve lossy compression in a different way from VarDCT. The name refers to
JPEG_XL
Machine to increase pressure of gas by reducing its volume
increasing the heat rejection during the compression process. One common way of cooling the gas during compression is to use cooling jackets around the casing
Compressor
Equation in mechanics
properties of the solid with compression. The assumption Murnaghan is to assume that the bulk modulus is a linear function of pressure : K = K 0 + P
Murnaghan_equation_of_state
encoding information in this manner is the cornerstone of lossless data compression. A hundred years later, frequency modulation illustrated that bandwidth
History_of_information_theory
Subset of artificial intelligence
and compression. A system that predicts the posterior probabilities of a sequence given its entire history can be used for optimal data compression (by
Machine_learning
Design parameter of gas turbines
is a function of inlet pressure ratio and compressor pressure ratio: O P R = I P R × C P R {\displaystyle OPR=IPR\times CPR} The terms compression ratio
Overall_pressure_ratio
Disk compression utility
DriveSpace (initially known as DoubleSpace) is a disk compression utility supplied with MS-DOS starting from version 6.0 in 1993 and ending in 2000 with
DriveSpace
Tables for the Data Encryption Standard
shifted left (circular) one or two bits • After shifting, two parts are then combined to form a 56 bit temp-key again • The compression P-box changes the 56
DES_supplementary_material
Data structure for storing non-overlapping sets
Ackermann function. Although disjoint-set forests do not guarantee this time per operation, each operation rebalances the structure (via tree compression) so
Disjoint-set_data_structure
Style of skateboarding
called the new improved version the C7. The Carver C7, which uses a compression spring to drive the rotating arm, is recognized as the first official
Surfskating
Type of motorcycle
and piston diameter measurements. Doing so will lower the compression ratio, but still function. Cylinders from later bikes are not compatible. While the
Kawasaki_KX500
Signal processing technique
Pulse compression is a signal processing technique commonly used by radar, sonar and echography to either increase the range resolution when pulse length
Pulse_compression
additions, and compression functions are used in iterative mode to ensure high complexity and pseudo-randomness of the output. In this way, the security
Security of cryptographic hash functions
Security_of_cryptographic_hash_functions
Electronic circuit which counteracts non-linear behavior of an amplifier
output power of the amplifier as a function of the input power on a logarithmic scale. In this illustration the compression is shown as the deviation from
Linearizer
Technique to compress data
type of optimal prefix code that is commonly used for lossless data compression. The process of finding or using such a code is Huffman coding, an algorithm
Huffman_coding
Engine where combustion is pulsed instead of continuous
engines are a lightweight form of jet propulsion, but usually have a poor compression ratio, and hence give a low specific impulse. The two main types of pulsejet
Pulsejet
Emergency procedure after sudden cardiac arrest
respiratory arrest that involves chest compressions, often combined with artificial ventilation, to preserve brain function and maintain circulation until spontaneous
Cardiopulmonary_resuscitation
Distortion of media caused by lossy data compression
A compression artifact (or artefact) is a noticeable distortion of media (including images, audio and video) caused by the application of lossy compression
Compression_artifact
Image luminance mapping function
encoding with this compressive power-law nonlinearity is called gamma compression; conversely, a gamma value γ > 1 {\displaystyle \gamma >1} is called
Gamma_correction
Lossy compression method for reducing the size of digital images
method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted
JPEG
Reversible data-stream transform
of compression. When efficiently implemented, it is fast enough that its benefits usually justify including it as an extra step in data compression algorithm
Move-to-front_transform
Message encoded with more bits than needed
transmit certain data. Data compression is a way to reduce or eliminate unwanted redundancy, while forward error correction is a way of adding desired redundancy
Redundancy (information theory)
Redundancy_(information_theory)
Video compression technique, used to efficiently predict and generate video frames
transmitted/stored images, the compression efficiency can be improved. Motion compensation is one of the two key video compression techniques used in video
Motion_compensation
Resampling method
In digital signal processing, downsampling, subsampling, compression, and decimation are terms associated with the process of resampling in a multi-rate
Downsampling (signal processing)
Downsampling_(signal_processing)
Capacity of a material or structure to withstand loads tending to reduce size
such a way that it extends it is said to be in tension. On the other hand, if the material compresses and shortens it is said to be in compression. On an
Compressive_strength
Function for integral Fourier-like transform
the shifts of one generating function ψ in L2(R), the mother wavelet. For the example of the scale one frequency band [1, 2] this function is ψ ( t ) =
Wavelet
Speed of sound wave through elastic medium
sound, and the two contributions cancel out exactly. In a similar way, compression waves in solids depend both on compressibility and density—just as
Speed_of_sound
Form of internal combustion
Homogeneous charge compression ignition (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer (typically air) are compressed to
Homogeneous charge compression ignition
Homogeneous_charge_compression_ignition
Hopkins University published a genetic compression algorithm that does not use a reference genome for compression. HAPZIPPER was tailored for HapMap data
Computational_genomics
Video compression format, succeeds H.264/MPEG-4 AVC
also known as H.265 and MPEG-H Part 2, is a patent-encumbered video compression standard designed as part of the MPEG-H project as a successor to the
High_Efficiency_Video_Coding
Message-digest hashing algorithm
although limited, result of finding a "pseudo-collision" of the MD5 compression function; that is, two different initialization vectors that produce an identical
MD5
Internal combustion engine type
end of the exhaust/intake (or scavenging) is completed along with the compression of the mixture. The second stroke encompasses the combustion of the mixture
Two-stroke_engine
System used in computer graphics applications
estimation is a need for video compression. A metric for matching a macroblock with another block is based on a cost function. The most popular in terms of
Block-matching_algorithm
Implementations of the A3 and A8 functions of the GSM standard
a compression function with two 128 bits inputs and one 128 bits output, hence their names. Ki and RAND are used as the inputs of the compression function
COMP128
Block cipher
as one of the 17 NESSIE finalists. SHACAL-1 is based on the following observation of SHA-1: The hash function SHA-1 is designed around a compression function
SHACAL
Process of mapping a continuous set to a countable set
sometimes serve the same purpose as a noise gate or squelch function. Especially for compression applications, the dead-zone may be given a different width
Quantization (signal processing)
Quantization_(signal_processing)
Potential for two waves to interfere
some generalization thereof. Waves in a rope (up and down) or slinky (compression and expansion) Surface waves in a liquid Electromagnetic signals (fields)
Coherence_(physics)
Digital video coder/decoder
video compression, codec is a portmanteau of encoder and decoder, while a device that only compresses is typically called an encoder, and one that only
Video_codec
Thermodynamic process in which no mass or heat is exchanged with surroundings
the traditional way of thermodynamics, introduced by Rankine. It is pointed out in the present article that, for example, if a compression of a gas is rapid
Adiabatic_process
Average uncertainty in variable's states
and one bits. Information theory is useful to calculate the smallest amount of information required to convey a message, as in data compression. For
Entropy_(information_theory)
Type of mechanical seal
generally to prevent leakage from or into the joined objects while under compression. It is a deformable material that is used to create a static seal and
Gasket
Patched software backdoor
On 29 March 2024, a malicious backdoor was discovered in the compression software XZ Utils. The backdoor gives an attacker who possesses a specific private
XZ_Utils_backdoor
compression Advice (complexity) Amortized analysis Arthur–Merlin protocol Best and worst cases Busy beaver Circuit complexity Constructible function Cook-Levin
List of computability and complexity topics
List_of_computability_and_complexity_topics
Term in information theory
information dimension as the fundamental limit of almost lossless data compression for analog sources under various regularity constraints of the encoder/decoder
Information_dimension
T-shaped construction module
serves as a flange or compression member in resisting compressive stresses. The web (vertical section) of the beam below the compression flange serves to resist
T-beam
Exhaust emission control device
increased the available oxygen, allowing the catalyst to function as intended. Some three-way catalytic converter systems have air injection systems with
Catalytic_converter
Electronic amplitude-limiting device
signals that exceed this threshold. Limiting is a type of dynamic range compression. Clipping is an extreme version of limiting. Limiting is any process
Limiter
Cryptographic signature scheme
signatures is based on the security of the one-way hash function and the length of its output. For a hash function that generates an n-bit message digest
Lamport_signature
Series of image file formats
TIFF/IT-P2 added a number of functions to TIFF/IT-P1 like: CMYK spot colors only (when appropriate) Support for the compression of CT and BP data (JPEG and
TIFF
Internal combustion engine
supplied to the hot-bulb chamber on the compression stroke of the engine. Most hot-bulb engines were produced as one or two-cylinder, low-speed two-stroke
Hot-bulb_engine
If there are more items than boxes holding them, one box must contain at least two items
into one-to-one correspondence. To do so requires the formal statement of the pigeonhole principle: "there does not exist an injective function whose
Pigeonhole_principle
Lossless data compression method
Golomb coding is a lossless data compression method using a family of data compression codes invented by Solomon W. Golomb in the 1960s. Alphabets following
Golomb_coding
Data processing technique to eliminate duplicate copies of repeating data
shared copy. While possible to combine this with other forms of data compression and deduplication, it is distinct from newer approaches to data deduplication
Data_deduplication
Voronoi tessellation where the generating point of each Voronoi cell is also its centroid
according to a certain function. For example, a grayscale image can be used as a density function to weight the points of a CVT, as a way to create digital
Centroidal Voronoi tessellation
Centroidal_Voronoi_tessellation
Frequency of a chirp pulse
-inthe-frequency-domain Cook C.E. & Paolillo J., "A Pulse Compression Predistortion Function for Efficient Sidelobe Reduction in a High-Power Radar", Proc
Chirp_spectrum
Audiophile audio processing technology
quality, whether the lossy audio compression degrades the sound quality, the utility of the authentication function, and the effect of licensing fees
Master_Quality_Authenticated
ONE WAY-COMPRESSION-FUNCTION
ONE WAY-COMPRESSION-FUNCTION
Surname or Lastname
Variant spelling of German and Jewish Wachs.English
Variant spelling of German and Jewish Wachs.English : metonymic occupational name for a seller or gatherer of beeswax, Middle English wax (from Old English weax). In the Middle Ages wax was an important commodity, used among other things for making candles.
Surname or Lastname
English and French
English and French : nickname from Middle English, Old French jay(e), gai ‘jay’ (the bird), probably referring to an idle chatterer or a showy person, although the jay was also noted for its thieving habits.The name is associated with a Huguenot family from La Rochelle, France, who settled in New Amsterdam. Peter Jay was the scion of the NY Jays; his son John (1745–1829) was a U.S. diplomat and first chief justice of the U.S. Supreme Court.
Female
Danish
, compassion, grace; and, prayers.
Female
Hawaiian
Hawaiian name NOE means "mist; misty rain."
Female
English
 English name derived from the vocabulary word, DAY means "day." Feminine form of Middle English Daye, meaning "day."
Boy/Male
British, English
Variant of Wayland; From the Land by the Path
Surname or Lastname
English
English : variant spelling of Way.
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : habitational name from Sai in Orne or Say in Indre, perhaps so called from a Gaulish personal name Saius + the Latin locative suffix -acum.English : metonymic occupational name for a maker or seller of say, a kind of finely textured cloth, Middle English say (from Old French saie, Latin saga, plural of sagum ‘military cloak’). In some instances the surname may have arisen from a nickname for an habitual wearer of clothes made of this material.Southern French : topographic name from saix ‘rock’ (Latin saxum), or a habitational name from a place named with this word, for example, Say in Loire, Saix in Tarn and Vienne, Le Saix in Hautes-Alpes, or Les Saix in Isère.William Say of Bristol, England, was a member of the Society of Friends who settled in America toward the close of the 17th century. His descendant Thomas Say (1787–1834) of Philadelphia is known as the father of descriptive entomology in America.
Girl/Female
Australian, Christian
Sunshine; Bright; Day
Male
Hindi/Indian
(जय) Hindi name derived from the Sanskrit word jaya, JAY means "victory." Compare with another form of Jay.
Male
English
 Short form of English names beginning with Gay-, such as Gabriel "man of God" or "warrior of God," and Gaylord, GAY means "dandy." Compare with feminine Gay.
Male
English
Short form of English Raymond, RAY means "wise protector."
Surname or Lastname
English (chiefly southern)
English (chiefly southern) : topographic name for someone who lived near a road or path, Old English weg (cognate with Old Norse vegr, Old High German weg), or a habitational name from some minor place named with this word, as for example any of the places called Way or Waye, in Devon.
Girl/Female
Arabic
One of the Lovers
Female
English
 Variant spelling of English Oona, possibly ONA means "famine, hunger." Compare with another form of Ona.
Female
French
Feminine form of French L�on, LÉONE means "lion."
Female
English
English name derived from the vocabulary word fay, from Old English faie, FAY means "fairy." This name was in use in the 19th century when an interest in medieval times and Arthurian legends--brought about mostly by Tennyson's Idylls of the King--led to the use of such names as Fay and Morgan, Percival, and Tristan.Â
Female
English
English name derived from the vocabulary word, GAY means "happy." Compare with masculine Gay.
Boy/Male
Shakespearean
Henry VI, Part 2' Lord Say.
Male
Scandinavian
 Variant spelling of Scandinavian Kai, CAY means "lord." Compare with another form of Cay.
ONE WAY-COMPRESSION-FUNCTION
ONE WAY-COMPRESSION-FUNCTION
Girl/Female
Tamil
Saumanasya | ஸௌமாஂநாஸà¯à®¯à®¾
Gladness
Girl/Female
Indian
Fragrance
Boy/Male
Tamil
Belonging to sound, A musical note
Girl/Female
Australian, Celtic, Christian, Irish
Graceful; Kernel
Girl/Female
Tamil
Pravasthi | பà¯à®°à®µà®¾à®¸à®¤à¯€
Boy/Male
Hindu
Nectar
Boy/Male
Indian
Sweet
Boy/Male
Gujarati, Indian, Kannada
Ever Cheerful and Beaming
Boy/Male
Hindu
Male
Spanish
Spanish form of Latin Thaddaeus, TADEO means "courageous, large-hearted."
ONE WAY-COMPRESSION-FUNCTION
ONE WAY-COMPRESSION-FUNCTION
ONE WAY-COMPRESSION-FUNCTION
ONE WAY-COMPRESSION-FUNCTION
ONE WAY-COMPRESSION-FUNCTION
n.
The pressure of the type on the paper, or the result of such pressure, as regards its appearance; as, a heavy impression; a clear, or a poor, impression; also, a single copy as the result of printing, or the whole edition printed at a given time.
n.
Length of space; distance; interval; as, a great way; a long way.
n.
Way; road; path.
n.
The merrymaking of May Day.
n.
That by, upon, or along, which one passes or processes; opportunity or room to pass; place of passing; passage; road, street, track, or path of any kind; as, they built a way to the mine.
a.
Going away; departing; of or pertaining to one who goes away.
n.
Progress; as, a ship has way.
n.
A sense of heaviness or obstruction in the body or mind; depression; dullness; lassitude; as, an oppression of spirits; an oppression of the lungs.
adv.
Away.
n.
Manner; method; mode; fashion; style; as, the way of expressing one's ideas.
v. i.
To deviate from the right way; to go away or astray; to turn side; to swerve.
n.
The act of pressing; compression; oppression.
n.
An instrument for compressing an artery (esp., the femoral artery) or other part.
a.
Compressing, or having power or tendency to compress; as, a compressive force.
n.
A machine for compressing gases; especially, an air compressor.
v. t.
To go or travel to; to go in, as a way or path.
indef. pron.
Any person, indefinitely; a person or body; as, what one would have well done, one should do one's self.
n.
The act of compressing, or state of being compressed.
n.
Determined course; resolved mode of action or conduct; as, to have one's way.
n.
Right of way. See below.