翻訳と辞書
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・ Permission
・ Permission (magazine)
・ Permission (philosophy)
・ Permission culture
・ Permission marketing
・ Permission slip
・ Permission to Fly
・ Permission to Kill
・ Permission to Land
・ Permission to officiate
・ Permission to Rock... Denied
・ Permission to Shine
・ Permission-driven user interface
・ Permissive
・ Permissive (film)
Permissive Action Link
・ Permissive dialing
・ Permissive free software licence
・ Permissive hypercapnia
・ Permissive hypotension
・ Permissive mood
・ Permissive society
・ Permissive temperature
・ Permissive Working (railway)
・ Permissiveness
・ Permissiveness (biology)
・ Permit
・ Permit (fish)
・ Permit mail
・ Permit Reply Mail


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Permissive Action Link : ウィキペディア英語版
Permissive Action Link

A Permissive Action Link (PAL) is a security device for nuclear weapons. Its purpose is to prevent unauthorized arming or detonation of the nuclear weapon.
The United States Department of Defense definition is:
The earliest PALs were little more than locks introduced into the control and firing systems of a nuclear weapon, that would inhibit either the detonation, or the removal of safety features of the weapon. More recent innovations have included encrypted firing parameters, which must be decrypted to properly detonate the warhead, plus anti-tamper systems which intentionally mis-detonate the weapon, destroying it without giving rise to a nuclear explosion.
== History ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Permissive Action Link」の詳細全文を読む



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