Detailed information about PAL systems design and their use is classified, although these mechanisms have been offered to Pakistan[27] for protection of their nuclear weapons.[28] In the end, the US decided that it could not do so for legal reasons; the Pakistanis were also concerned that such technology would be sabotaged by a "kill-switch" that the US could operate. However, many experts in the field of nuclear technology in the US government supported the publication of the PAL system because they considered Pakistan's arsenal as the world's most vulnerable to abuse by terrorist groups.
In November 2007, The New York Times revealed that the US had invested $100 million since 2001 in a secret program to protect Pakistan's nuclear arsenal. Instead of transferring PAL technology, the US provided helicopters, night vision and nuclear detection devices, as well as training to Pakistani personnel in order to prevent the theft or misuse of Pakistan's nuclear material, warheads, and laboratories.[28] According to the Pentagon officials and the U.S. military accounts, Pakistan believed to develop and code its own version of the PAL technology, and they believe to be Pakistan's nuclear arsenals to be well secured.