Secure single sign-on to operating system via power-on password

No: 7484241
No. de la demande: 10994620
Date d'archivage: 2004-11-22
Date d'emission: 2009-01-27
Genre: B2
Pretentions: 17
Feuilles de dessin: 4
Resume: Methods and arrangements are disclosed for secure single sign on to an operating system using only a power-on password. In many embodiments modified BIOS code prompts for, receives and verifies the power-on password. The power-on password is hashed and stored in a Platform Configuration Register of the Trusted Platform Module. In a setup mode, the trusted platform module encrypts the operating system password using the hashed power-on password. In a logon mode, the trusted platform module decrypts the operating system password using the hashed power-on password.
Classes d'Etats-Unis:
	No:713 - Electrical computers and digital processing systems: support  / No:193 - By stored data protection
Inventeurs:
	Challener David Carroll  (22)
	Goodman Steven Dale  (21)
	Hoff James Patrick  (13)
	Rivera David  (3)
	Springfield Randall Scott  (1)
Examinateur principal: Hoffman Brandon S
Agents:
	Carlos Munoz-Bustamante (ORG)  (3)
	Schubert Osterrieder & Nickelson PLLC (ORG)  (78)
Cessionnaires:
	Lenovo (Singapore) Pte. Ltd. (ORG)  (101)
Domaine de recherches:
	Compound tools
Autre references:
	Divyangi Anchan et al., “Regaining Single Sign-On Taming the Beast,” SIGUCCS, Sep. 21-24, 2003, San Antonio, Texas, USA, 2003, pp. 166-171.
	Birgit Pfitzmann et al., “Privacy in Browser-Based Attribute Exchange, ” WPES, Nov. 21, 2002, Washington, D.C., USA, 2002, pp. 52-62.
References:
	5983273 - Method and apparatus for providing physical security for a user account and providing access to the user's environment and preferences
	6125457 - Networked computer security system
	6178511 - Coordinating user target logons in a single sign-on (SSO) environment
	6240512 - Single sign-on (SSO) mechanism having master key synchronization
	6243816 - Single sign-on (SSO) mechanism personal key manager