SYSTEM AND METHOD FOR PORTABLE AUTHENTICATION

摘要

A portable device, such as a cellular telephone, engages the user in a challenge-response sequence that is based on recognition of the user's utterance and also upon verification of the user's speech patterns or voiceprint. The challenge-response protocol presents the user with an unexpected challenge word, which the user is then requested to respond to. The system maintains a secure data store of challenge words which it adapts and augments as the user makes use of the portable device. The portable device provides the user with a convenient, single access point through which he or she can authenticate with a variety of disparate secure devices ranging from door locks, ATM machines, financial institutions and third-party business associates.