via Boing Boing (where there's a pic) : "Kryptos is a sculpture that artist Jim Sanborn created in 1990 for the CIA headquarters in Langley Virginia. The artwork contains four cryptographic puzzles and only three have been solved so far." Keeps the CIA busy in their lunch breaks, anyway!!
See also Wired News.
]^23003]^23900]navy],](](]]]black],]3]1]2]3]1]1]4]1]2]3]1]1],](](]^23FFFff])])]Freshblog]Blogger^20Hacks^2C^20Categories^2C^20Tips^20^26^20Tricks],](],](](]^23900](](](]^23666](](](]^23900](],](](]75]20],](](]^23FFF])])]^23900]1.5]15],](](]^23999])])]^23900]^23CCC])])]^23900]30]^23003]^23003],](](]^23333](],](]^23003]^23039]^2306C],](](]^23CCC])])],](](]^23EEE])])],](](]^23CCC])])],](]^23006]^23666]15]3]25]20]^23003],](](],](],](](],](]^23003](](](],](](](],]black](](](],](](]black](](](](](],]^2336F]^23003](],](]Posted^20at^20^24TIME^20by^20^24AUTH.]20],](](]^23900])])]^23CCC])])]^23666]30]black]black],](](]^23333](],](]^23333]^23039]^2306C]Freshblog]]]Home]^24HOME]First^20Page]Email]^24EMAIL]Mail^20me^21]RSS]^24RSS]RSS^20Feed]Comments^20Feed]]Comment^20Feed^20]Archive]]]^24ARCHIVE]^20]]Freshtags]]]Horm])blog.horm.org]Hallucinations^20Of^20Reabsorbed^20Mind]Phorm])p.horm.org]Another^20Phormation]Etc]]]^3Cimg^20src^3D^22)psyc.horm.org/barimg/bar_psycho.png^22^20width^3D^2280^22^20height^3D^2215^22^20alt^3D^22PsycHo^3A^20Free^20Template^20Generator^22^20style^3D^22border^3A^200px^20solid^20black^22^20/^3E]^24PSYCHO]PsycHo^3A^20Free^20Template^20Generator]^3Cimg^20src^3D^22)psyc.horm.org/barimg/bar_firefox.png^22^20width^3D^2280^22^20height^3D^2215^22^20alt^3D^22Get^20FireFox^21^22^20style^3D^22border^3A^200px^20solid^20black^22^20/^3E])www.mozilla.org/products/firefox/]Get^20Firefox^21]^3Cimg^20src^3D^22)psyc.horm.org/barimg/bar_xhtml.png^22^20width^3D^2280^22^20height^3D^2215^22^20alt^3D^22XHTML^20Validator^22^20style^3D^22border^3A^200px^20solid^20black^22^20/^3E])validator.w3.org/check/referer]XHTML^20Validator^26^2361470^3BPsycHo}){kind=small}
