21-letter words containing o, u, t, c, a, h
- one-way hash function — (algorithm) (Or "message digest function") A one-way function which takes a variable-length message and produces a fixed-length hash. Given the hash it is computationally infeasible to find a message with that hash; in fact one can't determine any usable information about a message with that hash, not even a single bit. For some one-way hash functions it's also computationally impossible to determine two messages which produce the same hash. A one-way hash function can be private or public, just like an encryption function. MD5, SHA and Snefru are examples of public one-way hash functions. A public one-way hash function can be used to speed up a public-key digital signature system. Rather than sign a long message, which can take a long time, compute the one-way hash of the message, and sign the hash.
- orthophosphorous acid — a white to yellowish, crystalline, hygroscopic, water-soluble solid, H 3 PO 3 , used chiefly in the synthesis of phosphites.
- pathfinder prospectus — a prospectus regarding the flotation of a new company that contains only sufficient details to test the market reaction
- potassium thiocyanate — a colorless, crystalline, hygroscopic, water-soluble solid, KSCN, used chiefly in the manufacture of chemicals, dyes, and drugs.
- push the panic button — an alarm button for use in an emergency, as to summon help.
- rap over the knuckles — to reprimand
- rectangular hyperbola — a hyperbola with perpendicular asymptotes
- ring down the curtain — to lower the curtain at the end of a theatrical performance
- roman catholic church — the Christian church of which the pope, or bishop of Rome, is the supreme head.
- rutherford scattering — the scattering of an alpha particle through a large angle with respect to the original direction of motion of the particle, caused by an atom (Rutherford atom) with most of the mass and all of the positive electric charge concentrated at a center or nucleus.
- s-k reduction machine — An abstract machine defined by Professor David Turner to evaluate combinator expressions represented as binary graphs. Named after the two basic combinators, S and K.
- satisficing behaviour — the form of behaviour demonstrated by firms who seek satisfactory profits and satisfactory growth rather than maximum profits
- secure hash algorithm —
- snr bandwidth product — (communications) The integral of the SNR over frequency. The SNR bandwidth product is an important limit in the capacity of a communication channel.
- south pacific current — an ocean current that flows E in the South Pacific Ocean parallel to the Antarctic Circumpolar Current.
- space shuttle orbiter — orbiter (def 1).
- spicebush swallowtail — a swallowtail butterfly, Papilio troilus, having a dark body with yellow spots on the forewings and greenish hind wings.
- structural psychology — psychology centering on the analysis of the structure or content of conscious mental states by introspective methods.
- sunday school teacher — someone who teaches at a Sunday school
- take the consequences — to accept the results of one's actions
- tartarian honeysuckle — an Asian honeysuckle, Lonicera tatarica, having fragrant, white to pink flowers.
- the (norman) conquest — the conquering of England by the Normans under William the Conqueror in 1066
- the executive mansion — the White House
- the household cavalry — a group of British soldiers on horseback who have the job of protecting the king or queen and their family
- the scout association — a worldwide movement for boys or (in some countries) girls, founded as the Boy Scouts in England in 1908 by Lord Baden-Powell with the aim of developing character and responsibility
- therapeutic community — a group-based form of therapy for mental disorders, sometimes residential
- third party procedure — impleader.
- throw sb a curve ball — If someone throws you a curve or throws you a curve ball, they surprise you by doing something that you do not expect.
- throw someone a curve — a continuously bending line, without angles.
- to be hard luck on sb — to be unfortunate or unlucky for someone
- to change the subject — When someone involved in a conversation changes the subject, they start talking about something else, often because the previous subject was embarrassing.
- to sink without trace — If you say that someone or something sinks without trace or sinks without a trace, you mean that they stop existing or stop being successful very suddenly and completely.
- union of south africa — former name for South Africa, Republic of.
- william the conqueror — ("the Conqueror") 1027–87, duke of Normandy 1035–87; king of England 1066–87 (son of Robert I, duke of Normandy).
- without qualification — If something is stated or accepted without qualification, it is stated or accepted as it is, without the need for any changes.
- writ of habeas corpus — law: petition for hearing
- youth training scheme — (formerly, in Britain) a scheme, run by the Training Agency, to provide vocational training for unemployed 16–17-year-olds