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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
Extension to XMPP for multi-client end-to-end encryption
developed by Andreas Straub. According to Straub, OMEMO uses the Double Ratchet Algorithm "to provide multi-end to multi-end encryption, allowing messages
OMEMO
Non-federated cryptographic protocol
Skype for its "Private Conversations". The protocol combines the Double Ratchet Algorithm, prekeys (i.e., one-time ephemeral public keys that have been uploaded
Signal_Protocol
Topics referred to by the same term
genre Ratchet option, a financial derivative also known as cliquet option Double Ratchet Algorithm, an algorithm for managing cryptographic keys Ratchet (slang)
Ratchet
Cryptographic protocol for instant messaging
Authenticated Key Exchange algorithm such as Extended Triple Diffie-Hellman (X3DH) may be combined with the Double Ratchet Algorithm to construct such a channel
Sender_Keys
Privacy-focused encrypted messaging app
(formerly known as the TextSecure Protocol). The protocol combines the Double Ratchet Algorithm, prekeys, and an Extended Triple Diffie–Hellman (X3DH) handshake
Signal_(software)
Topics referred to by the same term
Veils' album Total Depravity Axólotl (star) Double Ratchet Algorithm, in cryptography (formerly Axolotl Ratchet) This disambiguation page lists articles
Axolotl_(disambiguation)
Cryptographic protocol
Android XMPP client called Conversations in 2015, integrates the Double Ratchet Algorithm used in Signal into the instant messaging protocol XMPP ("Jabber")
Off-the-Record Messaging protocol
Off-the-Record_Messaging_protocol
Method of exchanging cryptographic keys
optional authentication". X3DH was initially proposed as part of the Double Ratchet Algorithm used in the Signal Protocol. The protocol offers forward secrecy
Diffie–Hellman_key_exchange
Encrypted messaging application
"SimpleX Chat v5.6 (beta): adding quantum resistance to Signal double ratchet algorithm". simplex.chat. 2024-03-14. Retrieved 2026-01-06. "SimpleX". Whonix
SimpleX_Chat
Framework for cryptographic protocols
cryptographic designs (e.g., NaCl, CurveCP or the KDF chains used in the Double Ratchet Algorithm) and contributions from figures in cryptography and computing (e
Noise_Protocol_Framework
Practice in cryptography
approximately 15% for the initial handshake. The Signal Protocol uses the Double Ratchet Algorithm to provide forward secrecy. On the other hand, among popular protocols
Forward_secrecy
Encrypted communications firm
Silent Circle transitioned to using a protocol that uses the Double Ratchet Algorithm instead of SCIMP. The company is privately funded and operates
Silent_Circle_(software)
Open source encrypted chat application
having completed an independent security audit. Cryptocat uses a Double Ratchet Algorithm in order to obtain forward and future secrecy across messages,
Cryptocat
Networking protocol for real-time communication
for optional end-to-end encryption on a room-by-room basis via a Double Ratchet Algorithm implementation. It can ensure that conversation data at rest is
Matrix_(protocol)
Open source software organization
can be used to provide end-to-end encryption. It combines the Double Ratchet algorithm, prekeys, and a 3-DH handshake. Signal Messenger maintains several
Open_Whisper_Systems
Free encrypted messaging app
"more than a billion people worldwide". The protocol combines the Double Ratchet Algorithm, prekeys, and a 3-DH handshake. It uses Curve25519, AES-256, and
TextSecure
Dmitry Sklyarov • DomainKeys • Don Coppersmith • Dorabella Cipher • Double Ratchet Algorithm • Doug Stinson • Dragon (cipher) • DRYAD • Dual_EC_DRBG E0 (cipher)
Index of cryptography articles
Index_of_cryptography_articles
Curve25519 Data Encryption Standard Diffie–Hellman key exchange Double Ratchet Algorithm EdDSA Elliptic-curve cryptography Elliptic-curve Diffie–Hellman
List of cryptographic software
List_of_cryptographic_software
German cipher machine during World War II
design also included a feature known as double-stepping. This occurred when each pawl aligned with both the ratchet of its rotor and the rotating notched
Enigma_machine
Line deployed by scuba divers for navigation
1000+ ft (300 m). Reels for distance lines may have a locking mechanism, ratchet or adjustable drag to control deployment of the line and a winding handle
Distance_line
Asia excluding Japan) PlayStation All-Stars Battle Royale Ratchet & Clank Collection Ratchet & Clank: Full Frontal Assault Sleeping Dogs (Published by
List of Sony Interactive Entertainment video games
List_of_Sony_Interactive_Entertainment_video_games
Equipment used by divers to facilitate decompression
weights have been lost, but the diver is still at the bottom and has a ratchet reel with sufficient line. In this case the reel line is tied off to a
Decompression_equipment
Theory developed by black socialists in the United States
Triple oppression, also called double jeopardy, Jane Crow, or triple exploitation, is a theory developed by black socialists in the United States, such
Triple_oppression
that accumulate as a ratchet. Each mutation that arises in asexually reproducing organisms turns the ratchet once. The ratchet is unable to be rotated
Evolution of sexual reproduction
Evolution_of_sexual_reproduction
Ongoing theorised stock market bubble
artificial intelligence. Metz, Cade (November 10, 2025). "Why Debt Funding Is Ratcheting Up the Risks of the A.I. Boom". The New York Times. Retrieved February
AI_bubble
Optimality criterion in phylogeny
tree (by counting the number of character-state changes), there is no algorithm to quickly generate the most-parsimonious tree. Instead, the most-parsimonious
Maximum_parsimony
Accusations that Trump's ideology is fascist
the term fascist to describe Harris as he has doubled down on his insults against Harris and ratcheted up the intensity of his own rhetoric against political
Donald_Trump_and_fascism
Adages and sayings named after a person
Outlined in 1965 by Gordon Moore, co-founder of Intel Corporation. Muller's ratchet where mutations in a species will tend to accumulate. Muphry's law: "If
List_of_eponymous_laws
Video game franchise
"PlayStation Collections Available at Retail Today: God of War, inFAMOUS, Ratchet & Clank". PlayStation.Blog. Sony Computer Entertainment America. Archived
God_of_War_(franchise)
Social network focused on privacy
"Secret Chat" is limited to the paid subscription tier of mewe, and uses double ratchet encryption to ensure that chats are private and not visible even to
Mewe_(social_media)
2021–2025 U.S. presidential administration
Persian Gulf". Voa News. "Thousands of US troops arrive in Red Sea amid ratcheting Iran tensions". aljazeera. Nazzaro, Miranda (August 13, 2023). "McCaul
Presidency_of_Joe_Biden
Rotating circular machine part with teeth that mesh with another toothed part
Museum of gears and toothed wheels - antique and vintage gears, sprockets, ratchets and other gear-related objects. Kinematic Models for Design Digital Library
Gear
Hammered Copper, Ringer Style. Berlin & Dresden Friction Post, and Berlin Ratchet. Comes with a fine tuner.) YM-40 (3 1/2 octave Standard Padauk marimba)
List of Yamaha Corporation products
List_of_Yamaha_Corporation_products
Music composition by Karlheinz Stockhausen
génétique des oeuvres): 63–76. Decroupet, Pascal. 2012. "Le rôle des clés et algorithmes dans le décryptage analytique: L'exemple des musiques sérielles de Pierre
Gruppen
Series of image scanners by HP
sensor in place and ratchet it back several millimeters to allow for the disk buffer to clear and the scan to restart. The ratcheting motion prevents gaps
HP_ScanJet
Rapid decrease in Earth's biodiversity
biases inherent to sample size. Alroy also elaborated on three-timer algorithms, which are meant to counteract biases in estimates of extinction and origination
Extinction_event
Ratchet And Clank Trilogy – Coming May 2012". PlayStation Blog. Archived from the original on 4 December 2012. Retrieved 11 December 2016. "Ratchet:
High-definition remasters for PlayStation consoles
High-definition_remasters_for_PlayStation_consoles
Military occupation by Israel since 1967
net were reduced drastically: between 2001 and 2005 as defense outlays ratcheted up, child allowances were cut by 45%, unemployment compensation by 47%
Israeli occupation of the West Bank
Israeli_occupation_of_the_West_Bank
Change in the heritable traits of populations
John M.; Keeling, Patrick J.; et al. (2011). "How a neutral evolutionary ratchet can build cellular complexity". IUBMB Life. 63 (7): 528–537. doi:10.1002/iub
Evolution
Criticism of people who break sexual norms
Women who slut-shame other women continuously apply unfavorable sexual double standards. The term is also used to describe victim blaming for rape and
Slut-shaming
Alteration in the nucleotide sequence of a genome
L (April 2006). "Quantifying the genomic decay paradox due to Muller's ratchet in human mitochondrial DNA". Genetical Research. 87 (2): 133–59. doi:10
Mutation
Motion-sensing input device for the Xbox 360 and Xbox One
Retrieved February 28, 2015. Crecente, Brian (June 29, 2011). "Thank Ratchet and Clank for This Wonderful Disney Game". Kotaku. Gawker Media. Archived
Kinect
Theory of discrimination
predatory. In so doing, Curry says that the intersectional feminist concept of "Double Jeopardy" is fundamentally mistaken because intersectionality is over-determined
Intersectionality
Folding of DNA to create two- and three-dimensional shapes at the nanoscale
Simmel, Friedrich C.; Dietz, Hendrik (2022-07-20). "A DNA origami rotary ratchet motor". Nature. 607 (7919): 492–498. doi:10.1038/s41586-022-04910-y. PMC 9300469
DNA_origami
net were reduced drastically: between 2001 and 2005 as defense outlays ratcheted up, child allowances were cut by 45%, unemployment compensation by 47%
Human rights violations against Palestinians by Israel
Human_rights_violations_against_Palestinians_by_Israel
Watch designed for underwater diving
On diving watches the bezel is "unidirectional", i.e., it contains a ratchet so it can only be turned anti-clockwise to "increase" the apparent elapsed
Diving_watch
early work on the evolution of bacteriocins, his demonstration of Muller's ratchet in the RNA Virus Phi-6 Jiun-Shyan Chen, engineering professor Shu Chien
List of University of California, San Diego people
List_of_University_of_California,_San_Diego_people
Evolutionary process
model Court jester hypothesis Macroevolution Selection (genetic algorithm) Species problem Adaptive radiation Ecotype Polymorphism Chronospecies
Speciation
Ascent to the surface by a diver in an emergency
due to a loss of ballast weight, and controls ascent rate by use of a ratchet dive reel with the end of the reel line secured to the bottom. Lost buoyancy
Emergency_ascent
2015. Pao's lawsuit, which alleged that Perkins indulged in discriminatory double standards and denied her the senior partner position, resulted in a controversial
Gender equality in the technology industry
Gender_equality_in_the_technology_industry
grown rapidly so early. 2 October – A rippling graphene-based Brownian ratchet-related energy-harvesting circuit with the potential to deliver "clean
2020_in_science
Rescue of a distressed or incapacitated diver
Not all diving reels are suitable for this application. The reel needs a ratchet and a winding knob with a good grip and sufficient leverage. Some reels
Diver_rescue
million years is published by Saarinen & Lister (2023), who find evidence of ratchet-like mode of evolution, with periods of rapid increase in hypsodonty and
2023_in_paleomammalogy
Influence of the interaction between the user and the equipment on design
overruns. Reels used for deploying DSMBs usually have a thumb release ratchet to allow free running deployment and to prevent unwinding when there is
Human factors in diving equipment design
Human_factors_in_diving_equipment_design
DOUBLE RATCHET-ALGORITHM
DOUBLE RATCHET-ALGORITHM
Boy/Male
Sikh
Male
English
English name derived from the vocabulary word, from Latin nobilis, NOBLE means "noble."
Surname or Lastname
English
English : variant of Dibble.Altered spelling of German Deibel or Deubel.
Female
English
 Compare with another form of Rachel. Anglicized form of Scottish Gaelic Raghnaid, RACHEL means "battle counsel." Anglicized form of Greek Rhachel, meaning "ewe." In the bible, this is the name of Jacob's wife.
Boy/Male
Hindu
Born during the rainy season, Money
Boy/Male
Indian, Punjabi, Sikh
Remembering the Lord
Boy/Male
Indian, Punjabi, Sikh
Meditating in Truth; Truthful; God
Surname or Lastname
English
English : possibly a variant of Goble or Gobel.Perhaps an Americanized spelling of French Gobeil.
Girl/Female
Australian, Hebrew
Ewe; Female Sheep; Rachel was the Second and Favored Wife of Jacob in the Old Testament
Boy/Male
Indian, Punjabi, Sikh
Remembering the Real
Boy/Male
Sikh
Tells the truth
Female
Hebrew
(רָחֵל) Hebrew name RACHEL means "ewe." In the bible, this is the name of Jacob's favorite wife, and mother of Joseph and Benjamin. Compare with other forms of Rachel.
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : variant of Double.In some cases, probably an altered spelling of South German Dobel or Döbel, a topographic name for someone who lived in a gorge or deep valley, Middle High German southern dialect tobel.
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : nickname from Old French doubel ‘twin’ (literally ‘double’, from Late Latin duplus, classical Latin duplex, from du(o) ‘two’ + plek, a root meaning ‘fold’).
Surname or Lastname
English
English : from Old French hachet ‘small axe’, ‘hatchet’, hence a metonymic occupational name for a maker or user of such implements, or perhaps a nickname of anecdotal origin.
Boy/Male
Hindu
Lord Varun, Wise
Girl/Female
Christian, Hindu, Indian, Kannada
Money
Surname or Lastname
English
English : variant of Hatcher.
Boy/Male
Hindu, Indian
Money; Russian Currency
Male
English
Anglicized form of Irish Gaelic Dubhghall, DOYLE means "black stranger."Â
DOUBLE RATCHET-ALGORITHM
DOUBLE RATCHET-ALGORITHM
Boy/Male
Native American
White.
Female
English
English name derived from the vocabulary word, "praise," from Old French preisier, from Late Latin preciare, PRAISE means "price," hence "to value."
Girl/Female
Biblical
House of pity or mercy.
Female
Egyptian
, the granddaughter of Tetet.
Girl/Female
Arabic, Muslim
Granting; Giving; Gift; Leather
Boy/Male
Tamil
To try
Surname or Lastname
English
English : variant spelling of Mills.
Girl/Female
Muslim/Islamic
Smiling
Boy/Male
Muslim
From the battlefield
Girl/Female
Hindu, Indian, Marathi
White Lily
DOUBLE RATCHET-ALGORITHM
DOUBLE RATCHET-ALGORITHM
DOUBLE RATCHET-ALGORITHM
DOUBLE RATCHET-ALGORITHM
DOUBLE RATCHET-ALGORITHM
n.
Among compositors, a doublet (see Doublet, 2.); among pressmen, a sheet that is twice pulled, and blurred.
a.
To increase by adding an equal number, quantity, length, value, or the like; multiply by two; to double a sum of money; to double a number, or length.
n.
One who hatches, or that which hatches; a hatching apparatus; an incubator.
n.
A mechanism composed of a ratchet wheel, or ratch, and pawl. See Ratchet wheel, below, and 2d Ratch.
n.
Double beer; strong beer.
imp. & p. p.
of Double
n.
A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc.
n.
A detent, pawl, or ratchet, as that which catches the cogs of a ratchet wheel to prevent backward motion. See Illust. of Ratched wheel.
n.
One who, or that which, catches.
n.
The act of one that doubles; a making double; reduplication; also, that which is doubled.
a.
Double; doubled; reduplicative; repeated.
n.
One who, or that which, doubles.
n.
A game between two pairs of players; as, a first prize for doubles.
adv.
In a double degree; doubly.
n.
Double-quick time, step, or march.
adv.
Twice; doubly.
n.
The state of being double or doubled.
n.
One who patches or botches.
a.
To be the double of; to exceed by twofold; to contain or be worth twice as much as.
a.
Imperfectly hatched; as, half-hatched eggs.