Another WWII Message Decoded
It’s a really interesting code and story. (The first link has the most detailed information about the code and the cryptanalysis.)
Entries Tagged "history of cryptography"
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Cryptanalyst on British Postage Stamps
A 92-year-old World War II Bletchley Park codebreaker has had a set of commemorative stamps issued in his honor.
Last Battle-of-Midway Cryptanalyst
The last cryptanalyst at the Battle of Midway, Rear Admiral Donald “Mac” Showers, USN-Ret, passed away 19 October 2012. His interment at Arlington National Cemetery at Arlington, Virginia, will be Monday, April 15, at 3:00. The family made this a public event to celebrate his life and contributions to the cryptologic community.
NSA Acrostic Puzzles
Two puzzles from a 1977 issue of Cryptolog.
The NSA's Cryptolog
The NSA has published declassified versions of its Cryptolog newsletter. All the issues from Aug 1974 through Summer 1997 are on the web, although there are some pretty heavy redactions in places. (Here’s a link to the documents on a non-government site, in case they disappear.)
I haven’t even begun to go through these yet. If you find anything good, please post it in comments.
Possible Decryption of World War II Pigeon Message
A Canadian claims that the message is based on a WWII codebook. A spokesman from GCHQ remains dubious, but says they’ll be happy to look at the proposed solution.
EDITED TO ADD (1/14): The backstory. Skepticism about the alleged deciphering.
Comedy and Cryptography
Not the sort of pairing I normally think of, but:
Robin Ince and Brian Cox are joined on stage by comedian Dave Gorman, author and Enigma Machine owner Simon Singh and Bletchley Park enthusiast Dr Sue Black as they discuss secret science, code-breaking and the extraordinary achievements of the team working at Bletchley during WW II.
Audio here.
Roger Williams' Cipher Cracked
Another historical cipher, this one from the 1600s, has been cracked:
Senior math major Lucas Mason-Brown, who has done the majority of the decoding, said his first instinct was to develop a statistical tool. The 21-year-old from Belmont, Mass., used frequency analysis, which looks at the frequency of letters or groups of letters in a text, but initially didn’t get far.
He picked up critical clues after learning Williams had been trained in shorthand as a court stenographer in London, and built his own proprietary shorthand off an existing system. Mason-Brown refined his analysis and came up with a rough key.
Williams’ system consisted of 28 symbols that stand for a combination of English letters or sounds. How they’re arranged is key to their meaning; arrange them one way and you get one word, arrange them another, you get something different. One major complication, according to Mason-Brown: Williams often improvised.
Decrypting a Secret Society's Documents from the 1740s
Great story, both the cryptanalysis process and the Oculists.
EDITED TO ADD (12/13): This is a follow-up to a previous post. More here.
Three-Rotor Enigma Machine Up for Auction
Expensive, but it’s in complete working order. They’re also auctioning off a complete set of rotors; those are even rarer than the machines—which are often missing their rotors.
Sidebar photo of Bruce Schneier by Joe MacInnis.