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TSA Missed Boston Bomber Because His Name Was Misspelled In a Database
schwit1 sends this news from The Verge:
"Tamerlan Tsarnaev, the primary conspirator in the Boston Marathon bombing that killed three people, slipped through airport security because his name was misspelled in a database, according to a new Congressional report. The Russian intelligence agency warned U.S. authorities twice that Tsarnaev was a radical Islamist and potentially dangerous. As a result, Tsarnaev was entered into two U.S. government databases: the Terrorist Identities Datamart Environment and the Treasury Enforcement Communications System (TECS), an interagency border inspection database.
A special note was added to TECS in October of 2011 requiring a mandatory search and detention of Tsarnaev if he left the country. 'Detain isolated and immediately call the lookout duty officer,' the note reportedly said. 'Call is mandatory whether or not the officer believes there is an exact match.' 'Detain isolated and immediately call the lookout duty officer.' Unfortunately, Tsarnaev's name was not an exact match: it was misspelled by one letter. Whoever entered it in the database spelled it as 'Tsarnayev.' When Tsarnaev flew to Russia in January of 2012 on his way to terrorist training, the system was alerted but the mandatory detention was not triggered. Because officers did not realize Tsarnaev was a high-priority target, he was allowed to travel without questioning."
A special note was added to TECS in October of 2011 requiring a mandatory search and detention of Tsarnaev if he left the country. 'Detain isolated and immediately call the lookout duty officer,' the note reportedly said. 'Call is mandatory whether or not the officer believes there is an exact match.' 'Detain isolated and immediately call the lookout duty officer.' Unfortunately, Tsarnaev's name was not an exact match: it was misspelled by one letter. Whoever entered it in the database spelled it as 'Tsarnayev.' When Tsarnaev flew to Russia in January of 2012 on his way to terrorist training, the system was alerted but the mandatory detention was not triggered. Because officers did not realize Tsarnaev was a high-priority target, he was allowed to travel without questioning."
News at Nine: transliterations of names can be tricky... Some parts of the world use different alphabets...
I've written about this before; I used to write financial software for a living, and one of the requirements for a US bank was to provide a mechanism to detect transactions by an unauthorized person.
In short, the govt. provides a list of bad people in a text file. One name per line, all upper case, like it came out of an old batch system. We then check to see if the sender or receiver of any transaction /EXACTLY/ matches that string, case insensitive. If it's an exact letter-for-letter match, there's a flag that's set and the transaction is delayed, but it appears to go through as normal(*). What happens after that is the bank's responsibility, but that's the whole of the complexity.
Whoever made the list usually has a few variants of spelling; OSAMA BIN LADEN or OMASA BIN LADEN or OSMA BIN LADEN, for example. But that's it. Just spelling your name slightly differently is enough to avoid the flag. We're literally not allowed to add anything else, like soundex matching or handling foreign letters.
This is ~probably~ also how the TSA no fly list works, and why you still hear about false positives from time to time. It's also probably how any security works until it's been around for 20 years and they hire a contracting company to make them really good software that does what they want, instead of what they think they want it to do.
It just takes a very long time for software designed by a legislative committee with no technical awareness to morph into something usable, but that's government for you.
* - most transactions are not sent out until the end-of-day reconciliation anyway, so it looks like it's accepted like most other transactions, probably in a 'pending' state in your online balance - unless you're paying for a wire transfer or something.