History Main / TwoKeyedLock

14th Oct '17 6:49:05 AM xcountryguy
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* ''Film/WarGames'', to control a nuclear launch. One officer gets held at gunpoint for refusing to turn his key when ordered, [[spoiler: even though it was just a drill]]. That inspires NORAD to turn over launch control to an AI and leads to [[AIIsACrapshoot the main plot of the movie]].

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* ''Film/WarGames'', to control a nuclear launch. One officer gets held at gunpoint for refusing to turn his key when ordered, [[spoiler: even [[spoiler:even though it was just a drill]]. That inspires NORAD to turn over launch control to an AI and leads to [[AIIsACrapshoot the main plot of the movie]].



** There's also a two-part code, each part memorized by [=DARPA=] chief Donald Anderson and [=ArmsTech=] president Kenneth Baker, respectively. The [=PAL=] key option is stated to be a backup, as a way to disable Rex once the code has been entered, or to enable it if the code is somehow lost. [[spoiler: Snake is led to believe Psycho Mantis extracted Anderson's code, even though it should have been impossible, while Baker gave in to Revolver Ocelot's torture. It turns out Ocelot inadvertently killed Anderson before getting him to break, requiring Decoy Octopus to impersonate him and [[BatmanGambit have Snake figure out the key system so they could activate Rex]].]]

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** There's also a two-part code, each part memorized by [=DARPA=] chief Donald Anderson and [=ArmsTech=] president Kenneth Baker, respectively. The [=PAL=] key option is stated to be a backup, as a way to disable Rex once the code has been entered, or to enable it if the code is somehow lost. [[spoiler: Snake [[spoiler:Snake is led to believe Psycho Mantis extracted Anderson's code, even though it should have been impossible, while Baker gave in to Revolver Ocelot's torture. It turns out Ocelot inadvertently killed Anderson before getting him to break, requiring Decoy Octopus to impersonate him and [[BatmanGambit have Snake figure out the key system so they could activate Rex]].]]



* ''VideoGame/RatchetAndClankFutureACrackInTime'' includes a variation of this. Clank must use his newly-acquired [[spoiler: ability to shift time]] to record multiple copies of himself completing various tasks (such as pressing buttons or activating platforms), usually with the end goal of opening a door at the end of a room. The actions of the copies must be perfectly timed in order for the player controlling the "real" Clank to solve the puzzle; with up to four copies working at once to complete the task, the difficulty can ramp up pretty quickly.

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* ''VideoGame/RatchetAndClankFutureACrackInTime'' includes a variation of this. Clank must use his newly-acquired [[spoiler: ability [[spoiler:ability to shift time]] to record multiple copies of himself completing various tasks (such as pressing buttons or activating platforms), usually with the end goal of opening a door at the end of a room. The actions of the copies must be perfectly timed in order for the player controlling the "real" Clank to solve the puzzle; with up to four copies working at once to complete the task, the difficulty can ramp up pretty quickly.



* The Thieves' Guild vault in ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'' has one of these, with the keys being owned by the most powerful members of the guild. [[spoiler: No one realizes it's already been emptied by Guildmaster Mercer Frey, using a magical lockpick he stole from the goddess Nocturnal.]]

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* The Thieves' Guild vault in ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'' has one of these, with the keys being owned by the most powerful members of the guild. [[spoiler: No [[spoiler:No one realizes it's already been emptied by Guildmaster Mercer Frey, using a magical lockpick he stole from the goddess Nocturnal.]]



* ''WebVideo/AtopTheFourthWall'' uses the exact self-destruct code from Star Trek III in the ColdOpen for his review of... the comic adaptation of Star Trek III in order to [[spoiler: prevent Lord Vyce from taking his ship back. Vyce manages to stop the sequence before the ship blows up.]]

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* ''WebVideo/AtopTheFourthWall'' uses the exact self-destruct code from Star Trek III in the ColdOpen for his review of... the comic adaptation of Star Trek III in order to [[spoiler: prevent [[spoiler:prevent Lord Vyce from taking his ship back. Vyce manages to stop the sequence before the ship blows up.]]
8th Oct '17 10:10:25 PM Scifiwriterguy
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** Subverted in ''VideoGame/{{Portal 2}}'', where a timed two-switch interlock to open a blast door is defeated by [[spoiler:using the portal gun to cross the entire fifty-foot wide room to hit both switches within the time limit, rendering the safety spacing irrelevant]].
4th Sep '17 2:48:00 PM TwilightLord
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* ''VideoGame/TalesOfXillia'' has a gate that needs to be opened by two switches being charged with mana at the same time. The player is led to believe it'll be a timing puzzle like in ''VideoGame/FinalFantasyVII'', but the whole thing is done automatically via cutscene. The point of it is just to show that Leia isn't very good at channeling mana.
29th Jul '17 11:22:47 PM DelShiftB
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* ''Bellman & True'' (and SameStoryDifferentNames ''The Real McCoy'') has a two-key lock to enable or disable the elevator. During a five minute phase for the bank break in, they spend most of the time trying to figure out which of the keys open the elevator, in addition to discovering the order in which the keys are turned.
4th Jul '17 10:22:22 AM TRN
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** Some machines feature increasing sophisticated sensors to prevent the operator from bypassing the two hand start, which may include interrupted beam optical sensors(defeated by broomstick handles), capacitive finger buttons(hotdogs), and anti-tiedown logic(usually not worth defeating, but sometimes jumped out inside the panel).
14th Apr '17 2:19:22 AM JackG
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* ''Film/Godzilla2014''. A nuclear weapon on the deck of a naval vessel is armed via this trope, which along with the [[EverythingsBetterWithSpinning spinning cogs]] and countdown clock is presumably for RuleOfDrama rather than realism.
28th Mar '17 6:00:11 PM cluosborne
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* ''Film/SupermanIII'', to activate a satellite positioning system; although the two keys in question needed to be inserted simultaneously, not turned.

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* ''Film/SupermanIII'', to activate boot up a satellite positioning system; computer system located at a Webscoe subsidiary in Smallville called WheatKing; although the two keys in question needed to be inserted simultaneously, not turned.
19th Mar '17 11:57:34 PM tromag
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* Apparently, German libraries have a long tradition of keeping locked rooms known as the "giftschrank" (literally "poison cabinet") which contained censored writings considered to be hazardous (heretical writings in the past, Nazi literature more recently). In some libraries, the doors have dual locks with keys held by two separate staff members to ensure that only authorized people can access the works.
4th Mar '17 2:17:39 PM DarkHunter
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* Apparently, the final PowerLimiter placed upon [[PersonOfMassDestruction Hayate Yagami]] in ''Anime/MagicalGirlLyricalNanohaStrikers'' had to be removed simultaneously by [[TheBrigadier Admiral Chrono Harlaown]] and [[GoodShepherd Knight Carim]], making it a TwoKeyedLock even though they didn't have to be physically present near Hayate at the time.

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* ''Franchise/LyricalNanoha'':
** The Arc-en-Ciel superweapon in ''Anime/MagicalGirlLyricalNanohaAs'' requires two officers to activate, and special permission from the top brass for them to even carry the keys for it in the first place. Given the destruction it's capable of, this is well-warranted.
**
Apparently, the final PowerLimiter placed upon [[PersonOfMassDestruction Hayate Yagami]] in ''Anime/MagicalGirlLyricalNanohaStrikers'' had to be removed simultaneously by [[TheBrigadier Admiral Chrono Harlaown]] and [[GoodShepherd Knight Carim]], making it a TwoKeyedLock even though they didn't have to be physically present near Hayate at the time.
25th Jan '17 7:02:29 PM MiddleEighth
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[[folder: Fan Works]]
*The entrance to the white key chamber in ''Fanfic/TheKeysStandAlone: The Soft World'' is opened by two people placing their hands in two separate hand-shaped indentations, one on the floor, one on the ceiling.
[[/folder]]
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