The world`s most popular software for scrambling sensitive e-mails suffers from a programming flaw that could allow hackers to attack a user`s computer and, in some circumstances, unscramble messages. The software, called Pretty Good Privacy, or PGP, is the de facto standard for encrypting e-mails and is widely used by corporate and government offices, including some FBI agents and U.S. intelligence agencies. The scrambling technology is so powerful that until 1999 the U.S. government sought to restrict its sale out of fears that criminals, terrorists and foreign nations might use it. Full Story