History Main / TwoKeyedLock

22nd Sep '16 8:23:54 PM nombretomado
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* The {{story arc}} of ''MyLittlePonyFriendshipIsMagic'''s fourth season involves a six-locked chest that appears after the Elements are returned to the Tree of Harmony in the second half of the season premiere. Each of the Mane Six's keys is a memento given by a supporting character when they both learn a lesson about friendship.
* Ben and Kevin hacked the Omnitrix offscreen in ''Ben10UltimateAlien'' to ensure he wouldn't turn into Alien X by accident- a RealityWarper with the huge drawback of a conflicted mind that can't seem to agree on any mode of action- without using two keys to access it on the transformation options screen in case the GodzillaThreshold was crossed.

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* The {{story arc}} of ''MyLittlePonyFriendshipIsMagic'''s ''WesternAnimation/MyLittlePonyFriendshipIsMagic'''s fourth season involves a six-locked chest that appears after the Elements are returned to the Tree of Harmony in the second half of the season premiere. Each of the Mane Six's keys is a memento given by a supporting character when they both learn a lesson about friendship.
* Ben and Kevin hacked the Omnitrix offscreen in ''Ben10UltimateAlien'' ''WesternAnimation/Ben10UltimateAlien'' to ensure he wouldn't turn into Alien X by accident- a RealityWarper with the huge drawback of a conflicted mind that can't seem to agree on any mode of action- without using two keys to access it on the transformation options screen in case the GodzillaThreshold was crossed.
20th Aug '16 9:56:41 PM JackG
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* The nuclear missile locks in ''Film/TheHuntForRedOctober'' apparently had one of these. Although we never see the locks themselves, we see Captain Ramius taking possession of both keys -- which, as the doctor points out, sort of defeats the point.
** In [[Literature/TheHuntForRedOctober the novel]], it is stated that five officers are needed to carry out a launch. It also stated that in the event of the political officer's death, the captain was ''supposed'' to take charge of his key. There were probably other standing orders as to who inherits the other keys in the event of any of the other officers with launch keys dying on a voyage as well.
** A two key (two combination in the book) system was also used on a safe in the submarine that contained the mission orders and code books.

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* The nuclear missile locks in ''Film/TheHuntForRedOctober'' apparently had one of these. Although we never see the locks themselves, we see Captain Ramius taking possession of both keys -- which, as the doctor points out, sort of defeats the point.
** In
point. The movie plays with the idea that Ramius has gone mad and intends to start WW3, but in the novel [[Literature/TheHuntForRedOctober the novel]], it novel]] this idea is stated that rejected as five officers are needed to carry out a launch. It also stated that in the event of the political officer's death, the captain was ''supposed'' to take charge of his key. There were probably other standing orders as to who inherits the other keys in the event of any of the other officers with launch keys dying on a voyage as well.
**
well. A two key (two combination in the book) system was also used on a safe in the submarine that contained the mission orders and code books.
12th Jul '16 6:27:37 AM hoodiecrow
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* In the ''Series/DoctorWho'' episode "Journey's End", the Earth's self destruct requires three out of five UNIT soldiers in different countries around the world to work together to activate it.

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* ''Series/DoctorWho'':
**
In the ''Series/DoctorWho'' episode "Journey's End", the Earth's self destruct requires three out of five UNIT soldiers in different countries around the world to work together to activate it.it.
** "Dinosaurs on a Spaceship" has a manual override for the navigational system that requires two people "of the same gene-chain" to unlock it and pilot the ship. Fortunately any old DNA will do, and not just the DNA of the builders.
** Averted in "Cold War" the launch control system of a Soviet nuclear submarine allows [[spoiler:an Ice Warrior]] to retarget its missiles and ready them for launch using a single key [[spoiler:taken from the executive officer]]. It is an aversion, since the plot hinges on this being possible, [[spoiler:but ultimately we don't get to see if the two-key security actually was compromised]].
22nd Jun '16 8:18:51 PM Bissek
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* In ''[[VideoGame/{{Ys}} Ys Book I & II]]'', the second boss of Book I requires two keys to access, unlike the others.

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* In ''[[VideoGame/{{Ys}} Ys Book I & II]]'', the second boss of Book I requires two keys to access, unlike the others. Though in this case it's two sets of locked doors that one man can open sequentially, as opposed to one door that has to be opened by two people simultaneously.
22nd Apr '16 1:42:18 AM Chabal2
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* Averted in ''Literature/BigTrouble'', where a nuclear bomb in a suitcase gets lost in Miami.
--> "Could they set it off?" asked Baker. "I mean, doesn't it have, like, whaddyacallem, fail-safe things?"\\
"This thing wasn't built by good guys," Greer said. "It's not like in the movies, where the president has to give the Secret Code and two trusty soldiers have to turn their keys simultaneously. This thing was built by bad guys who wanna be able to set it down in a public place in a crowded city and arm it quickly."
18th Apr '16 4:06:49 AM TinMan
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* In ''Literature/TheSumOfAllFears'', not a physical lock, but when President Fowler orders a nuclear strike on Iran, he has to get it confirmed by someone else from an approved list. Since both the secretaries of State and Defense are dead, he tries to get CIA Deputy Director Jack Ryan to confirm the order. Ryan refuses, since it's an act of DisproportionateRetribution, using a nuke to kill one man. Turns out to be the right call since Iran wasn't actually behind the nuclear attack at the Super Bowl.
26th Mar '16 12:23:11 AM JackG
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** In another version of the Two Man Rule, nuclear missiles stationed in foreign countries had an American officer and an officer of the host nation in possession of one key. However it was pointed out that some of those nations (such as Turkey and Italy) had experienced military coups, so they could simply hit the American officer over the head and steal his key.

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** In another version of the Two Man Rule, nuclear missiles stationed in foreign countries had an American officer and an officer of the host nation in possession of one key. a launch key. However it was pointed out that some of those nations (such as Turkey and Italy) had experienced military coups, so they the locals could simply hit the American officer over the head and steal his key.
26th Mar '16 12:21:23 AM JackG
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Added DiffLines:

** In another version of the Two Man Rule, nuclear missiles stationed in foreign countries had an American officer and an officer of the host nation in possession of one key. However it was pointed out that some of those nations (such as Turkey and Italy) had experienced military coups, so they could simply hit the American officer over the head and steal his key.
25th Mar '16 8:17:12 PM JackG
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* Combined with NoOSHACompliance in ''Film/{{Hulk}}'' as the locks are close enough for [[MadScientist David Banner]] to activate the SelfDestructMechanism after stealing both keys.
15th Mar '16 12:36:27 AM Eddy1215
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* In ''{{Chaotic}}'', the Doors of the Deepmines, that act as the M'arillians' prison requires four keys held by the other four tribes to open.

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* In ''{{Chaotic}}'', ''WesternAnimation/{{Chaotic}}'', the Doors of the Deepmines, that act as the M'arillians' prison requires four keys held by the other four tribes to open.
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