World War II pigeon code 'could be unbreakable'

Help

An encrypted World War II message found in a fire place strapped to the remains of a dead carrier pigeon remains a mystery.

Top government code breakers and people around the world have attempted to crack the code.

John Maguire reports.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.