Abstract
AbstractWe present a novel single sign‐on (SSO) scheme known as secure distributed SSO (SeDSSO). SeDSSO provides secure fault‐tolerant authentication using threshold key encryption with a distributed authentication service. The authentication service consists of n total authentication servers utilizing a (t, n) threshold encryption scheme, where t distinct server‐signed messages are required to generate a message signed by the service. SeDSSO provides secure portable identities by defining a two‐factor identity that uses both a username/password and a unique USB device. The combination of a distributed authentication service and two‐factor identities allows SeDSSO to securely authenticate users in any environment. Copyright © 2008 John Wiley & Sons, Ltd.
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