from the break-your-own-codes dept.
RagingMaxx writes "An Italian antiques dealer has recently put to auction a mint condition, fully operational Enigma machine on eBay. The machine, dated circa 1938, will be sold to the highest bidder in just over a week, but after 30 hours of bidding the price has already surpassed $12,000 US. For those of you who can't afford the real thing, why not make your own?"
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals