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7 posts tagged with cryptography and cipher. (View popular tags)
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Someone is leaving what appear to be coded messages in the stacks of Weldon Library at the University of Western Ontario. (via)
posted by Horace Rumpole on Mar 25, 2014 - 63 comments

AES à la XKCD

A stick figure guide to the Advanced Encryption Standard. [via Bruce Schneier]
posted by Electric Dragon on Sep 26, 2009 - 21 comments

The XKCD Puzzle

XKCD author Randall Munroe appears to have left a neat little cryptographic puzzle for Reddit users in his new book. They're trying to decipher it.
posted by zarq on Sep 21, 2009 - 44 comments

Thomas and the cipher

Thomas Jefferson's cipher message from Robert Patterson For more than 200 years, buried deep within Thomas Jefferson's correspondence and papers, there lay a mysterious cipher -- a coded message that appears to have remained unsolved. Until now.... To Mr. Patterson's view, a perfect code had four properties: It should be adaptable to all languages; it should be simple to learn and memorize; it should be easy to write and to read; and most important of all, "it should be absolutely inscrutable to all unacquainted with the particular key or secret for decyphering." [more inside]
posted by caddis on Jul 2, 2009 - 22 comments

"It was beautiful, kind of like abstract art"

In March 2007, the FermiLab Office of Public Affairs in Batavia, IL "received a curious message in code" via USPS. In May 2008, scientists posted a facsimile image of the letter to their blog in the hopes of soliciting cryptologists to decipher the letter. [more inside]
posted by subbes on Jul 16, 2008 - 45 comments

BETWEEN SUBTLE SHADING AND THE ABSENCE OF LIGHT LIES THE NUANCE OF IQLUSION

If you work at Langley and you need a break from actual intelligence gathering, you can always try to crack the code to the sculpture right outside the cafeteria window. Kryptos is a sculpture by James Sanborn located on the CIA grounds which contains a four-part coded message: sections 1-3 have been solved (with Sanborn admitting he made a typo in section 2). Perhaps you'd like to join Elonka (and the hive mind) in having a go at section 4.
posted by goodnewsfortheinsane on Dec 3, 2006 - 14 comments

Le chiffre indéchiffrable

Plgjoekz xh jiw lwe zqsd meecebefi aqxaxgw xb pzchiottazlq (pbq kvqetnpavckxg) fqrut fegqeifrm nvednsvu ix xzt 9hu kifiuea, efijn dnzx gu tug Vskwcsem gaehrt ic qahogbvaquggd. Lpsxgr li Nxgrpebi vxr awx acvrpt dlw rwcpij (we qgvopgesq i wlgoaieb tgamnttzpbrvim gaevrz), Kadvnp Bkxahhn Jidpsb jan hgcs fw gwcthtiow wpfyqij, xn 1553. Oglkwg'h wzxpwbeavadmgc vnzrwhsrf tri hdkrz sx ihr valydp frkxs ihnv wkw kfinvhwgeq dy dlw dpiqsmh kra pbsygsfamgc os vhyww ivnb gsbe ogfyvw wwz, irv uoe vho jaggg bmet ia uefif wialvws yrcrc, ef jboziszaone msvt qbcpv qe huen. Gzpfymw Tpbocgo wmrqrawxjlya cbeuzsq Dmytnrte psj ivr Jvaiifj devacu gpi Ugizgax Asg, phb ml laf mezx ktqemx mctvn Fbmwsfvkl Cpsvpsum jtjripws hvu moxzdr n liupdr nadij, xb 1863. Gpi hdllclzlsqsgqg uxpugrc, wmrv na xzxs bpe, biepwa wrw df gje veki qblik qrrckkfdt pl i psnprtsyr oxhuwyl p cbopexwg.
posted by Plutor on Jul 5, 2005 - 69 comments

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