History Main / TrustPassword

16th Jan '18 11:02:36 AM kquinn0830
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** In [[Film/BackToTheFuture the first film]], Marty tries to convince 1955 Doc that he's from the future and he needs Doc's help. He first tries to reveal "future" history, which Doc laughs off because he refuses to believe that [[ItWillNeverCatchOn Hollywood actor Ronald Reagan is really President]]. Marty successfully gets Doc to believe him by telling him something only Doc would know -- the vision that led to his invention of the time machine.

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** In [[Film/BackToTheFuture the first film]], Marty tries to convince 1955 Doc that he's from the future and he needs Doc's help. He first shows him his driver's license and a picture of his family where his sister is wearing a sweatshirt that says "Class of '84" (Doc assumes he doctored them). He then tries to reveal "future" history, which Doc laughs off because he refuses to believe that [[ItWillNeverCatchOn Hollywood actor Ronald Reagan is really President]]. Marty successfully gets Doc to believe him by telling him something only Doc would know -- the vision that led to his invention of the time machine.
7th Dec '17 5:00:36 AM batty3108
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* In an Literature/AlexRider book, the titular character agrees that, when reporting to his handlers, if everything is okay, he'll preface his message by saying things are terrible. The wisdom for this being that if his cover was blown, his captors might make him report back saying "Everything is okay" - this was the signal that he needed rescuing.
7th Dec '17 4:52:24 AM batty3108
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** In detail: In ''Half Blood Prince'', the accepted wisdom is to pre-arrange these passwords with family members - an approach with obvious vulnerabilities - and the questions are asked in a way that doesn't afford much security should the impostor fail the test. In ''Deathly Hallows'', the questions are random, and posed to the suspected impostor ''at wandpoint''.
3rd Dec '17 12:41:56 PM Kirayoshi
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* In ''[[http://archiveofourown.org/works/10993269/chapters/24485088 The Tie that Binds]]'', a Franchise/MarvelCinematicUniverse crossover centering on ''Series/AgentsOfShield'', Agent Coulson is held prisoner by Thanos, whose agents showed him faked footage of his team being tortured, and Melinda May being killed. Meanwhile [[Film/TheGuardiansOfTheGalaxy Gamora]] makes contact with May on Earth and asks for a message to pass along to Coulson when they plan to rescue him from prison. May's message, which convinces Coulson that she's alive and the rest of his team are safe, is [[http://tvtropes.org/pmwiki/pmwiki.php/Recap/AgentsOfSHIELDS4E21TheReturn "Tell Phil I'm going to kick his ass for opening the Haig without me."]]
21st Nov '17 7:14:01 PM AnoneMouseJr
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* ''FanFic/AChanceMeetingOfTwoMoons'': How Artemis and Luna confirm their identities as the others' counterpart from a parallel universe - they simultaneously reveal the time they each caught their older sibling having drunken sex with their world's draconequus.
21st Nov '17 7:58:10 AM Synch
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** Mildly PlayedForLaughs in the ''Series/StarTrekDiscovery'' episode [[Recap/StarTrekDiscoveryS1E07MagicToMakeTheSanestManGoMad Magic To Make The Sanest Man Go Mad]]. When a vengeful Mudd uses TimeTravel to repeatedly destroy the ''Discovery'', and Lt. Stamets' tardigrade genes make him the only one who can retain his memory, he convinces Burnham to tell him a personal secret to use as a trust password. At the next reset, he walks up to her and blurts out [[spoiler:"You've never been in love!"]] without any context. Her reaction immediately puts Stamets into [[VerbalBackspace damage control mode]].
19th Nov '17 6:11:19 AM MadCat221
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* ''VideoGame/Fallout4'''s Railroad faction has "Do you have a Geiger Counter?" with the countersign "Mine is in the shop".
7th Nov '17 10:33:04 PM ryanasaurus0077
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* The Mexican national anthem sometimes sees use as a means of proving people's identity, i.e. whether or not they are "true Mexicans". Japanese police officers once used it to identify four burglars they had just arrested. Needless to say, they turned out to be Colombians who had used forged Mexican passports, as discovered after they proved unable to sing it.
24th Oct '17 10:58:25 AM JMQwilleran
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* Similar to the above example with children, news outlets have been recommending this in relation to the "grandparent scam," a scam in which someone calls up and pretends to be a family member and needs money. Recommended tips to avoid becoming a victim include "If you're suspicious, ask a question only a family member would know."
13th Oct '17 8:43:59 PM Teenlyokofan7777
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** In the sixth season finale, "To Where and Back Again", Starlight Glimmer and her team, venturing into a kingdom full of [[VoluntaryShapeshifting Changelings]], use the phrase "klutzy draconequus" as a trust password. Discord isn't exactly pleased.

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*** It proves useful in "The Times They Are A Changeling." [[spoiler: The Crystal Empire is on guard against a changeling. They don't know if the visitors from Ponyville are really them, so Cadance initiates the rhyme and Twilight reciprocates almost immediately, calming the guards down.]]
** In the sixth season finale, "To Where and Back Again", Starlight Glimmer and her team, venturing into a kingdom full of [[VoluntaryShapeshifting Changelings]], use the phrase "klutzy draconequus" as a trust password. Discord isn't exactly pleased. However when the phony Discord doesn't say "draconequus" after Starlight says "klutzy," she, Trixie, and Thorax immediately know what's up.
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http://tvtropes.org/pmwiki/article_history.php?article=Main.TrustPassword