E-Trade Group has bolstered the security of its on- line brokerage operation with Rainbow Technologies Inc.'s Cryptoswift II system, Rainbow announced.

Without this hardware-based method of accelerating cryptographic calculations, "a single Web server containing eight processors handled less than 20 simultaneous SSL customer sign-ons," said E-Trade information security director Cliff Reeser. He was referring to the Secure Sockets Layer cryptographic protocol that protects on-line sessions.

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