When anthrax was sent to the US Senate offices in 2001, interest in tamper-proof methods of circulating documents increased. Sealed Media designs and licenses electronic document security software, which was used by the US House of Representatives in the wake of the attack. The company’s Digital Rights Management system also allows users to recall e-mails they have sent and withdraw sensitive corporate documents. Martin Lambert founded Sealed Media in 1996 with seed capital of £1m from Pond Venture Partners. Other investors include Crescendo and 3i. The company has yet to break even, but its sales have risen 128% a year from £288,000 in 2001 to £1.5m in 2003.
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