Slashdot Mirror


How PALS Help Secure Nuclear Weapons

Hugh Pickens writes "The BBC reported last week that until 1998 no code or dual key system was required to arm British nuclear weapons. Bombs were armed by inserting a bicycle lock key (video) into the arming switch and turning it 90 degrees. Permissive Action Links (PALs) were introduced in the 1960s in America to prevent a mad General or pilot launching a nuclear war on their own and to control nuclear weapons that were at least partially controlled by other nations but as late as 1974, when an armed quarrel broke out between two members of NATO, Greece and Turkey, the Secretary of Defense learned that many tactical nukes were still not equipped with PALS. It has been reported that PALs have been installed on Pakistan's nuclear weapons to disarm or disable their triggering mechanism if the wrong code is entered or if the bomb is tampered with in any manner."

33 of 136 comments (clear)

  1. Quite sensible by niceone · · Score: 5, Funny

    It's because British people are inherently sensible and would not start Armageddon without a jolly good reason. Unlike all you mad foreigners.

    1. Re:Quite sensible by niceone · · Score: 2, Funny

      OMG +1 Insightful, could someone meta-meta-moderate that moderation +5 Funny?

    2. Re:Quite sensible by sseaman · · Score: 2, Informative

      I suspect it has less to do with fear of rogue generals illegally declaring war against other countries as it does with generals illegally declaring war against their own commander in chief. Surely no one understands better than Pervez Musharfaf that generals don't always voluntarily obey their President.

    3. Re:Quite sensible by davetd02 · · Score: 2, Insightful

      You have clearly never watched Dr. Strangelove, Or How I Learned to Stop Worrying and Love the Bomb. The movie should be required viewing as an artifact of cold-war culture; even if its lessons aren't directly relevant today (we longer live in a world defined by two nuclear powers in an eternal standoff with a hair trigger) it captures the absurdity of the era very well. Plus, as a pure comedy, the movie has aged well.

    4. Re:Quite sensible by caluml · · Score: 2, Funny

      No, no, it's quite true. We've had our Empire, and, to be honest, they're a lot of trouble. See India/Pakistan. You just end up blamed for everything. :)

    5. Re:Quite sensible by Duhavid · · Score: 2, Informative

      If you haven't already, watch "Fail Safe".

      --
      emt 377 emt 4
    6. Re:Quite sensible by meringuoid · · Score: 2, Funny
      It's because British people are inherently sensible and would not start Armageddon without a jolly good reason.

      It therefore surprises me that the following countries are not radioactive holes in the ground:

      Croatia
      Portugal (in 2004 and 2006)
      Brazil
      Romania
      Argentina (1986 and 1998)
      Germany (too many bloody times to bear thinking about)

      We're exceptionally forbearing with the nukes, even when we do have a jolly good reason.

      --
      Real Daleks don't climb stairs - they level the building.
  2. Rumor had it... by b0s0z0ku · · Score: 4, Interesting
    that the PALs on quite a few US tactical nukes at the height of the Cold War were set to 0000 or something similar.

    -b.

    1. Re:Rumor had it... by darth_MALL · · Score: 2, Funny

      I have the same combination on my luggage!

    2. Re:Rumor had it... by ais523 · · Score: 5, Interesting

      According to Wikipedia, this is actually true, so I don't know why it was modded 'Funny', maybe because it's true and funny; Wikipedia gives http://www.cdi.org/blair/permissive-action-links.cfm as the source. The combination was actually 00000000, but that isn't really much safer. (They apparently changed this rule about 30 years ago, so you can't take advantage of it nowadays.)

      --
      (1)DOCOMEFROM!2~.2'~#1WHILE:1<-"'?.1$.2'~'"':1/.1$.2'~#0"$#65535'"$"'"'&.1$.2'~'#0$#65535'"$#0'~#32767$#1"
    3. Re:Rumor had it... by GroeFaZ · · Score: 2, Funny

      0 0 0 0? That's amazing! I've got the same combination on my luggage!

      --
      The grass is always greener on the other side of the light cone.
    4. Re:Rumor had it... by ducomputergeek · · Score: 3, Informative
      On the minuteman ICBM's, one of the last launch procedures up until the late 1970's was to set the PAL's to 00000000.

      I've spoken to former Silo men and they've confirmed at this was the case and the reasoning behind it was to make sure that people did not forget the codes (al la in the heat of the moment they freeze and forget) or to prevent some beurcractic mix up and SILO 123 got SILO 456's PAL codes, etc..

      And apparently this was done on the quiet. Not that it was a big secret as much as they just didn't talk about it.

      --
      "The problem with socialism is eventually you run out of other people's money" - Thatcher.
    5. Re:Rumor had it... by Solandri · · Score: 2, Insightful

      So does that mean the Pakistani nukes aren't secure even if they have PALs installed?

  3. A chance to tag something drstrangelove by antifoidulus · · Score: 2, Interesting

    You still have to wonder if a determined(and clever) mad general still could set off armageddon though(a la Dr. Strangelove)

  4. Sigh of relief by DigiShaman · · Score: 3, Funny

    has been reported that PALs have been installed on Pakistan's nuclear weapons...


    I've always wondered. Given the state of Pakistan and all that, I can truely sleep better at night knowing this. I just hope we're not deluded into a false sense of security.
    --
    Life is not for the lazy.
    1. Re:Sigh of relief by plsuh · · Score: 2, Interesting

      "Quis custodiet ipsos custodes?" -- "who watches the watchers?" In this context, "who holds the codes for the PALs?"

      The US has shared information on how to add PALs to a nuclear weapon to just about anyone who has a declared or undeclared nuclear weapon capability. It's in everyone's best interest that nuclear weapons be kept under solid negative control, to make the "mad general" or "stolen weapon" scenarios a little bit less scary. It does not mean that the US or any other nation holds the PAL codes to Pakistan's nuclear weapons; and I can certainly see why any Pakistani government would object to someone else holding the codes.

      The big problem is that there are large segments of the Pakistani military (particularly the Interservice Military Intelligence branch, according to reports) that are sympathetic to the radical Islamic factions and might hand over the PAL codes along with a weapon. Another "what if" is the scenario where a radical Islamic government comes to power that wants to provide a nuclear weapon to al-Qaeda and/or the Taliban as a matter of policy. If this is a legitimate government with support from the military then they will have access to the PAL codes. Under the geopolitical circumstances (particularly the tensions with India over Jammu and Kashmir), I would think that a Pakistani general would want the country's political leadership to be able to authorize release of nuclear weapons as a deterrent to India, regardless of whether or not the general was a supporter of radical Islam.

      Even if a general or group of generals managed to lose all of the current PAL codes, a legitimate government would be able to reconsitute the PALs with new codes in a matter of weeks to months. Under that scenario, the government might even decide to reconstitute the weapons without PALs to prevent a like-minded group of generals from cutting them off again. To my mind, this would be an even worse outcome.

      Unfortunately, to an outsider such as myself (and likely most of the rest of the world) the internal workings of Pakistan's political and military structure are opaque and Byzantine. I certainly don't claim to understand how all of the various factions and pressures are likely to play out. I can only speak to the obvious and confirmable -- but the actual outcomes are likely to depend most on the parts that I cannot observe or confirm. Along with a U.S. government that seems to base its decisions only on the obvious and substitutes jingoism and ideology for any hint of rational thought, this is a truly worrisome situation.

      I wouldn't breathe too deeply just yet.

      --Paul

  5. Bicycle lock key by Anonymous Coward · · Score: 3, Insightful

    So, in other words, the British nukes could have been armed by anyone possessing a Bic pen.

  6. Bicycle Lock? by grassy_knoll · · Score: 2, Interesting

    Have to wonder if they restricted pens in the area of the nukes, since it's so easy to pick a bicycle lock with one:

    http://www.youtube.com/watch?v=0hsM88Wx8QQ

    Probably not. Wouldn't be sporting to pick the lock and all, so no Brit would ever do that.

  7. Yes Minister! by Hemogoblin · · Score: 4, Funny

    Jim Hacker: Prime Minister
    Sir Humphrey: Cabinet Secretary
    ---

    Sir Humphrey: "With Trident we could obliterate the whole of Eastern Europe."
    Jim Hacker: "I don't want to obliterate the whole of Eastern Europe."
    Sir Humphrey: "It's a deterrent."
    Jim Hacker: "It's a bluff. I probably wouldn't use it."
    Sir Humphrey: "Yes, but they don't know that you probably wouldn't."
    Jim Hacker: "They probably do."
    Sir Humphrey: "Yes, they probably know that you probably wouldn't. But they can't certainly know."
    Jim Hacker: "They probably certainly know that I probably wouldn't."
    Sir Humphrey: "Yes, but even though they probably certainly know that you probably wouldn't, they don't certainly know that, although you probably wouldn't, there is no probability that you certainly would."

    1. Re:Yes Minister! by ameline · · Score: 2, Insightful

      One of my favorite quotes on the need to know... (also Bernards longest sentence :-)

      Bernard: Apparently, the fact that you needed to know was not known at the time that the now known need to know was known, therefore those that needed to advise and inform the Home Secretary perhaps felt the information he needed as to whether to inform the highest authority of the known information was not yet known and therefore there was no authority for the authority to be informed because the need to know was not, at that time, known or needed.

      --
      Ian Ameline
  8. the PAL system was neutered by US generals by SuperBanana · · Score: 4, Informative

    Permissive Action Links (PALs) were introduced in the 1960s in America to prevent a mad General or pilot launching a nuclear war on their own

    Wow, that glosses over reality very nicely. The codes were all zeros until the 80's, because said generals refused to implement a system that would prevent them from "hitting back".

    He rightly insisted on Permissive Action Links for the US Strategic Air Command Minuteman missiles and bombs - so that they could only be armed and detonated by the the correct codes from the President or the rest of the chain of command. However, it turns out, that whilst McNamara was nominally in charge, that SAC decided to secretly order all the PAL codes to be set to eight zeros, so that there would not be any delays caused by communications problems during a nuclear war.

    (From http://yorkshire-ranter.blogspot.com/2006/03/how-not-to-write-about-uk-nuclear.html)

    What's hilarious is that there were extensive efforts to implement PAL securely; all sorts of tamper-proofing and obfuscation in the weapons to make it such that you'd have to have a fair bit of training to have any hope of setting one off. Roughly the equivalent of installing high-security deadbolts throughout your property, and leaving the key in the front door lock.

    1. Re:the PAL system was neutered by US generals by SnowZero · · Score: 4, Interesting

      Wow, that glosses over reality very nicely. The codes were all zeros until the 80's, because said generals refused to implement a system that would prevent them from "hitting back". The keys were all set by 1977, and the "all 0's" codes were only used on ICBMs stationed in the US by that time. It's worth noting that US ICBMs required dual-activated keys, so it was still secure against a single compromised person (but not two due to the bad codes). Bombs overseas had proper codes once they got PALs (which did take too long to deploy). So, while it took far too long to deploy proper security, lets at least get our facts right.

      There isn't a really good reason the British should take 21 years longer than the (already late) US to deploy PALs with proper codes, and over 40 years later to use a dual-key initiation. "Someone else was late doing it" is not an excuse, especially when you are twice as late.
  9. Pakistan DOES NOT have PALS by d2_m_viant · · Score: 3, Informative
    There's conflicting information about whether the Pakistani's have PALS. According to a recent article in the New York Times, the Pakistani's do not have it:

    In the end, despite past federal aid to France and Russia on delicate points of nuclear security, the administration decided that it could not share the system with the Pakistanis because of legal restrictions.
    And furthermore:

    In addition, the Pakistanis were suspicious that any American-made technology in their warheads could include a secret "kill switch," enabling the Americans to turn off their weapons.
    Likewise with Clinton:

    While many nuclear experts in the federal government favored offering the PALS system because they considered Pakistan's arsenal among the world's most vulnerable to terrorist groups, some administration officials feared that sharing the technology would teach Pakistan too much about American weaponry. The same concern kept the Clinton administration from sharing the technology with China in the early 1990s.
  10. Not secure by jihadist · · Score: 2, Interesting

    How do we secure them from our insane elected "leaders"? If George W decides that Iran really is the antichrist, he may send in some warheads to make them glow like Vegas. Vladimir Putin is currently putting Russia on nuclear alert because George W wants to built an anti-missile shield around Russia. We might as well let the things be secured by bicycle key at this rate!

  11. Re:If you REALLY want to be safe by d2_m_viant · · Score: 4, Insightful
    What a bunch of nonsense. A county is threatening us with nuclear weapons, and our salvation rests in the fact that their citizenry isn't "happy" with their government? How the hell is that going to save American lives? You may be willing to stake your children's life on that, but I'm not.

    We just have to take that risk if we really believe in freedom
    No, we don't. Since when are "freedom" and "defending yourself" mutually exclusive terms? The most important figures in our country's history have been willing to fight and die for what they believed in, not the least of which was the notion of being free.

    Having bombs on standby does not really help anyone, it just increases the chance of everyone killing each other.
    Actually, quite the opposite, it dramatically decreases the chances that bombs will be used.
  12. nukes in Turkey? by haaz · · Score: 2, Interesting

    I thought the U.S. missiles in Turkey were removed as part of negotiation that ended the Cuban-Turkish Missile Crisis. I believe that was one of the terms Robert Kennedy worked out with the Soviets: we'll withdraw our missiles from your backyard if you'll withdraw your missiles from our backyard.

    Also, rumor has it the Soviet submarine K129 was hijacked by elite troops, and tried to launch a missile at Pearl Harbor. If this happened, and the sub did try to launch a missle, the missile's safety mechanisms caused it to self-destruct, taking the sub down to the bottom of the sea. There's a lot of rumor and conspiracy theory about it, but Project Jennifer seems to have been about recovering the sunken Soviet sub.

    --
    -- haaz.
  13. proof of insanity by fermion · · Score: 2, Interesting
    Here is the scenario. We generally want to be able to defend ourselves using what ever means necessary, but there are some means hat are so dangerous that we cannot actually let the normal chain of command control the use of such weapons. This inevitable means that such weapons become less reliable, less likely to be used, and less of a threat. Sure it is one thing to insure a weapon cannot be used against a friendly, but it is quite another to say that we must protect it from those who are fully authorized to use them. If you think about it, we don't even take that much care to insure friendly weapons do not fall into terrorist hands. If we have a weapon, don't keep it from being used. If we can't use it, then don't have, at least not in huge numbers. This does not even bring into account the reliability of certain components(not theoretical, but the actually reliability of manufactured items).

    Which is just to say that the US nuclear weapon program is one of the greatest examples of pork in history. The pork potion of the program was initiated in response to questionable analysis by the CIA, and lead to such events as the Iran-Contra drug running scandals. It is important to note that up to the point of the collapse of the Soviet Union, the CIA was reporting that Union was stable, strong, and an imminent threat. The 2.2 trillion 1980's dollar spent, along with an equal amount spent by the political successor of that administration, should be the envy of any tax and spend democrat, and has surely lead to a total deficit that will likely be at least 75% of GDP by the end of 2008.

    --
    "She's a scientist and a lesbian. She's not going to let it slide." Orphan Black
  14. CPE1704TKS by Zymergy · · Score: 2, Funny

    Come on! Someone else admit it.
    I can't be the ONLY geek and "WarGames" fan to have once used "CPE1704TKS" or "CPE-1704-TKS" as a password. http://www.imdb.com/title/tt0086567/goofs

  15. Re:threats and safeties by BlueParrot · · Score: 2, Insightful

    I really don't think the pakistani nukes are as much aimed at the US as they are against China / India. Lets face it, as mad as Bush might be, if you have a history of military conflict with a country next-doors and they are also building nukes, then that will probably be your main concern.

    In terms of deterring capability having 50 nukes and 3000 nukes is really not that much of a difference IF you can deliver them reliably. This is where the superpowers differ from the smaller nuclear weapon states. The US have a number of nuclear subs giving a second-strike capability. A country like Pakistan is much more vulnerable to a sudden surprise attack, which could theoretically leave them unable to retaliate.

  16. Obligatory Doctor Who... by D'Arque+Bishop · · Score: 2, Funny

    The Brigadier: [Describing the secret missile-sites information hidden in the safe of the cabinet minister] ...and naturally the only country that could be trusted with such a role was Great Britain.
    The Doctor: Well, naturally; I mean, the rest are all foreigners!

  17. A recent newspaper article claimed otherwise by Master+of+Transhuman · · Score: 2, Interesting

    ...that Pakistan's nukes do NOT have PALs installed.

    So somebody has got it wrong. Either they had them in 2003 or they didn't - or only some of them have it. The article I read said that Pakistan relied on separating the fissile material and the rest of the weapon components to keep them secure. And that Pakistan has not and will not reveal the location of their weapons to the US, fearing that the US would take them out if the US perceived they were at threat of being seized by Islamic militants in the country, leaving Pakistan defenseless against India's nuclear arsenal.

    I suspect the earlier article about PALs was propaganda intended to allay people's fears that Pakistan's nukes are inadequately controlled.

    --
    Richard Steven Hack - This sig is TOO GODDAMN SHORT TO DO ANYTHING USEFUL WITH! MORONS!
  18. Re:If you REALLY want to be safe by asuffield · · Score: 2, Insightful

    Sure, some other country can have some and threaten us with them, but they'll be the tyrants, not us, and I'm sure when their citizens see how their government acts, they will be scared of them and not trust them or be happy themselves.


    One only has to look at the US in recent years to see that this, sadly, does not work. They invade foreign countries for their own power and profit, they force insane laws on other countries, and they are the only country ever to use nuclear weapons on civilian targets - and most of their citizens still somehow think that all this is a good idea.
  19. Re:Tin Foil Hat Time. by zerkon · · Score: 2, Funny

    I'm not entirely certain, but I don't *think* a tin foil hat is going to provide much protection.

    My two cents anyway