Glossary · MWE Terms · O
L1 — paginated flat list. Pick a POS, pick a letter.
TermTypeDefinitionClassificationsUpdated
One-Dimensional LanguagenounMWEa programming language whose expressions are represented by strings of charactersverified
One-Flowered PyrolanounMWEdelicate evergreen dwarf herb of north temperate regions having a solitary white terminal flowerverified
One-Flowered WintergreennounMWEdelicate evergreen dwarf herb of north temperate regions having a solitary white terminal flowerverified
One-Man RulenounMWEa form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.)verified
One-part CodenounMWECode in which plain text elements and their accompanying code groups are arranged in alphabetical, numerical, or other systematic order, so one listing serves for both encoding and decoding. One-part codes are normally small codes used to pass small volumes of low-sensitivity information.verified
One-time TapenounMWEPunched paper tape used to provide key streams on a one-time basis in certain machine cryptosystems.verified
One-Way EncryptionnounMWEIrreversible transformation of plaintext to cipher text, such that the plaintext cannot be recovered from the cipher text by other than exhaustive procedures even if the cryptographic key is known.verified
One-Way FunctionnounMWEA (mathematical) function, f, which is easy to compute the output based on a given input. However given only the output value it is impossible (except for a brute force attack) to figure out what the input value is.verified
One-Way Hash AlgorithmnounMWEHash algorithms which map arbitrarily long inputs into a fixed-size output such that it is very difficult (computationally infeasible) to find two different hash inputs that produce the same output. Such algorithms are an essential part of the process of producing fixed-size digital signatures that can both authenticate the signer and provide for data integrity checking (detection of input modification after signature).verified
one-way information flownounMWEAn architectural security property of an information path between two systems or domains in which data is permitted to travel in only one direction — from source to destination — with no return channel possible. It distinguishes itself from general access control by regulating *where* data can travel rather than *who* may access it, making bidirectional communication structurally or physically impossible rather than merely policy-prohibited. Standards bodies such as NIST (SP 800-53 AC-4 and SP 800-171 3.1.3) cite it as an enforcement mechanism alongside write-permission verification and regrading, specifically "employing hardware mechanisms to enforce one-way information flows" — typically realized as a data diode or unidirectional security gateway — applied wherever networks of differing confidentiality or integrity must be separated, such as preventing back-channel exfiltration into classified networks or blocking malware ingress into high-integrity industrial control systems.verified
One-Way Light TimenounMWEthe elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial objectverified
One-Way StreetnounMWEa street on which vehicular traffic is allowed to move in only one directionverified
Onion PlantnounMWEbulbous plant having hollow leaves cultivated worldwide for its rounded edible bulbverified
Onion Yellow-Dwarf VirusnounMWEthe virus that produces stunting and yellowing of the leaves of onion plantsverified
Online AttacknounMWEAn attack against an authentication protocol where the Attacker either assumes the role of a Claimant with a genuine Verifier or actively alters the authentication channel. The goal of the attack may be to gain authenticated access or learn authentication secrets.verified
Online Certificate Status ProtocolnounMWEAn online protocol used to determine the status of a public key certificate.verified
Online CryptosystemnounMWECryptographic system in which encryption and decryption are performed in association with the transmitting and receiving functions.verified
Online LearningnounMWEfitting [one's] model incrementally as the data flows in (streaming data).verified
online terminalnounMWEA web-browser-based access to an acquirer, processor or third party service provider website to authorize payment card transactions, where the merchant manually enters payment card data via a securely connected web browser. Unlike physical terminals, virtual payment terminals do not read data directly from a payment card. Because payment card transactions are entered manually, virtual payment terminals are typically used instead of physical terminals in merchant environments with low transaction volumes.verified
Ooze LeathernounMWEa very soft leather made from the skins of calves and having a suede finish on the flesh sideverified
Open Checklist Interactive LanguagenounMWESCAP language for expressing security checks that cannot be evaluated without some human interaction or feedback.verified
Open FireplacenounMWEan open recess in a wall at the base of a chimney where a fire can be builtverified
Open market operationsnounMWEThe buying and selling of government securities in the open market in order to expand or contract the amount of money in the banking system.verified
Open MarriagenounMWEa marriage in which each partner is free to enter into extraneous sexual relationships without guilt or jealousy from the otherverified
Open OrdernounMWEa military formation leaving enough space between ranks to allow an inspecting officer to passverified
Open PrimarynounMWEa primary in which any registered voter can vote (but must vote for candidates of only one party)verified
Open ShopnounMWEa company whose workers are hired without regard to their membership in a labor unionverified
Open Shortest Path FirstnounMWEOpen Shortest Path First is a link state routing algorithm used in interior gateway routing. Routers maintain a database of all routers in the autonomous system with links between the routers, link costs, and link states (up and down).verified
Open SocietynounMWEa society that allows its members considerable freedom (as in a democracy)verified
Open StoragenounMWEAny storage of classified national security information outside of approved containers. This includes classified information that is resident on information systems media and outside of an approved storage container, regardless of whether or not that media is in use (i.e., unattended operations).verified
Open Systems InterconnectnounMWEA model for the design of a network. The open systems interconnect (OSI) model defines groups of functionality required to network computers into layers. Each layer implements a standard protocol to implement its functionality. There are seven layers in the OSI model.verified
Open Systems InterconnectionnounMWEOSI (Open Systems Interconnection) is a standard description or "reference model" for how messages should be transmitted between any two points in a telecommunication network. Its purpose is to guide product implementers so that their products will consistently work with other products. The reference model defines seven layers of functions that take place at each end of a communication. Although OSI is not always strictly adhered to in terms of keeping related functions together in a well-defined layer, many if not most products involved in telecommunication make an attempt to describe themselves in relation to the OSI model. It is also valuable as a single reference view of communication that furnishes everyone a common ground for education and discussion.verified
Open Vulnerability and Assessment LanguagenounMWESCAP language for specifying low-level testing procedures used by checklists.verified
Open WeavenounMWEa weave in which warp threads never come together, leaving interstices in the fabricverified
Open Web Application Security ProjectnounMWEAn open community dedicated to enabling organizations to conceive, develop, acquire, operate, and maintain applications that can be trustedverified
Open-End CreditnounMWEa consumer credit line that can be used up to a certain limit or paid down at any timeverified
Open-End FundnounMWEa regulated investment company with a pool of assets that regularly sells and redeems its sharesverified
Open-End Investment CompanynounMWEa regulated investment company with a pool of assets that regularly sells and redeems its sharesverified
Open-End WrenchnounMWEa wrench having parallel jaws at fixed separation (often on both ends of the handle)verified
Open-Heart SurgerynounMWEheart surgery in which the rib cage is spread open, the heart is stopped and blood is detoured through a heart-lung machine while a heart valve or coronary artery is surgically repairedverified
Open-Hearth FurnacenounMWEa furnace for making steel in which the steel is placed on a shallow hearth and flames of burning gas and hot air play over itverified