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Experts at intelligence agency GCHQ have asked for help in decoding a message found attached to a pigeon leg, thought to date back to WWII.
The dead bird was found in a chimney in Surrey, England a few weeks ago.
But without more information, the code may never be cracked, according to the BBC's security correspondent Gordon Corera.
The code is as follows:
AOAKN HVPKD FNFJW YIDDC
RQXSR DJHFP GOVFN MIAPX
PABUZ WYYNP CMPNW HJRZH
NLXKG MEMKK ONOIB AKEEQ
WAOTA RBQRH DJOFM TPZEH
LKXGH RGGHT JRZCQ FNKTQ
KLDTS FQIRW AOAKN 27 1525/6
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The dead bird was found in a chimney in Surrey, England a few weeks ago.
But without more information, the code may never be cracked, according to the BBC's security correspondent Gordon Corera.
The code is as follows:
AOAKN HVPKD FNFJW YIDDC
RQXSR DJHFP GOVFN MIAPX
PABUZ WYYNP CMPNW HJRZH
NLXKG MEMKK ONOIB AKEEQ
WAOTA RBQRH DJOFM TPZEH
LKXGH RGGHT JRZCQ FNKTQ
KLDTS FQIRW AOAKN 27 1525/6
Video