back door at English => English (Longman) Of Explained:
n [C]
1 a door at the back or side of a building:
2 get in through the back door: to achieve something by having an unfair secret advantage// --His father works for the company so he got in through the back door.//
back door at English => English (GNU/Linux) Of Explained:
n. [common] A hole in the security of a system deliberately left in place by designers or maintainers. The motivation for such holes is not always sinister; some operating systems, for example, come out of the box with privileged accounts intended for use by field service technicians or the vendor's maintenance programmers. Syn. trap door; may also be called a 'wormhole'. See also iron box, cracker, worm, logic bomb. Historically, back doors have often lurked in systems longer than anyone expected or planned, and a few have become widely known. Ken Thompson's 1983 Turing Award lecture to the ACM admitted the existence of a back door in early Unix versions that may have qualified as the most fiendishly clever security hack of all time. In this scheme, the C compiler contained code that would recognize when the 'login' command was being recompiled and insert some code recognizing a password chosen by Thompson, giving him entry to the system whether or not an account had been created for him. Normally such a back door could be removed by removing it from the source code for the compiler and recompiling the compiler. But to recompile the compiler, you have to use the compiler -- so Thompson also arranged that the compiler would recognize when it was compiling a version of itself, and insert into the recompiled compiler the code to insert into the recompiled 'login' the code to allow Thompson entry -- and, of course, the code to recognize itself and do the whole thing again the next time around! And having done this once, he was then able to recompile the compiler from the original sources; the hack perpetuated itself invisibly, leaving the back door in place and active but with no trace in the sources. The talk that suggested this truly moby hack was published as "Reflections on Trusting Trust", "Communications of the ACM 27", 8 (August 1984), pp. 761-763 (text available at http://www.acm.org/classics). Ken Thompson has since confirmed that this hack was implemented and that the Trojan Horse code did appear in the login binary of a Unix Support group machine. Ken says the crocked compiler was never distributed. Your editor has heard two separate reports that suggest that the crocked login did make it out of Bell Labs, notably to BBN, and that it enabled at least one late-night login across the network by someone using the login name 'kt'. From Jargon Dictionary http://www.tldp.org/LDP/Linux-Dictionary/
back door at English => English (Moby Thesaurus II) Of Explained:
105 Moby Thesaurus words for "back door":
French door, afterpart, afterpiece, archway, back, back road,
back seat, back side, back stairs, back street, back way,
backstairs, barway, behind, bolt-hole, breech, bulkhead, by-lane,
bypass, bypath, byroad, bystreet, byway, carriage entrance,
cellar door, cellarway, clandestine, covert, covert way, detour,
door, doorjamb, doorpost, doorway, escalier derobe, escape hatch,
escape route, feline, front door, furtive, gate, gatepost, gateway,
hatch, hatchway, heel, hidlings, hind end, hind part, hindhead,
hole-and-corner, hugger-mugger, lintel, occiput, porch, portal,
porte cochere, posterior, postern, privy, propylaeum, pylon, quiet,
rear, rear end, rearward, reverse, roundabout way, scuttle,
secret exit, secret passage, secret staircase, shifty, side door,
side road, side street, skulking, slinking, slinky, sly, sneaking,
sneaky, stealthy, stern, stile, storm door, surreptitious, tail,
tail end, tailpiece, threshold, tollgate, trap, trap door,
turnpike, turnstile, under-the-counter, under-the-table,
undercover, underground, underground railroad, underground route,
underhand, underhanded, unobtrusive
Back door at English => English (Websters 1913) Of Explained:
Back door \Back" door"\
A door in the back part of a building; hence, an indirect
way. --Atterbury.
back door at English => English (WordNet) Of Explained:
back door
n 1: a secret or underhand means of access (to a place or a
position); "he got his job through the back door"
2: an entrance at the rear of a building [syn: {back entrance}]
back door at English (WD) Of Explained:
==English==
Alternative forms
* backdoorNoun
Inter: en-noun » head=back doorRelated terms
* back-door manTranslations
Inter: trans-top » subsidiary entrance to buildingInter: trans-mi » d
- Italian: Inter: t- » it|porta di dietro|f
- Norwegian: Inter: t- » no|bakdør|m
- Swedish: Inter: t- » sv|bakdörr|c
- Welsh: Inter: t- » cy|drws cefn
Inter: trans-botto » m
Inter: trans-top » secret, unprotected means of access
- Finnish: Inter: t- » fi|takaovi, Inter: t- » fi|takaportti
- German: Inter: t+ » de|Hintertür|f
- Greek: Inter: t+ » el|κερκόπορτα|tr=kerkóporta|f
Inter: trans-mi » d
Inter: trans-botto » m
Inter: trans-top » slang: anus
- Finnish: Inter: t- » fi|takaovi
Inter: trans-mi » d
Inter: trans-botto » m
Inter: checktrans-to » p
- Dutch: achterdeur Inter: f » m
Inter: trans-mi » d
Inter: trans-botto » m
Adjective
Inter: en-adj » head=back door|-Related terms
* back door sliderVerb
Inter: en-verb » head=back doorTranslations
Inter: trans-top » to attempt to accomplish by indirect meansInter: trans-mi » d
Inter: trans-botto » m
See also
* front doorExternal links
* Inter: pedialite » Backdoor- Inter: pedialite » Backdoor (computing)
Translation: et » back door
Translation: id » back door
Translation: it » back door
Translation: ru » back door
Translation: ta » back door
Translation: zh » back door