If errors are detected, Bob can throw away the key and ask for another.

ECONOMIST: Secure cryptography is only as safe as its weakest link

To others, Mr Blunkett's willingness to throw away the key is almost as alarming.

ECONOMIST: A setback for the government's anti-terrorism measures

Mike Paranzino runs the pressure group Throw Away the Key from the town of Kensington in Maryland and is a former adviser to senior Republican politicians.

BBC: NEWS | Americas | US wrestles with execution question

If he was guilty I would throw away the key.

BBC: Lynda Spence trial: Murder accused 'held woman'

The tabloid throw-away-the-key cause has been boosted.

ECONOMIST: Bagehot