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Rainbow Technologies was an encryption and information security company based in Orange County, California, that was acquired by SafeNet, Inc. in 2003. Through its acquisition of Mykotronx, Rainbow Technologies was responsible for developing and supporting top secret encryption devices used by the NSA, NRO, and other government agencies. The company also had a line of commercial security and identity management products like the iKey USB authentication token.
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Source of the article : Wikipedia