The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2009
Filed:
Nov. 22, 2004
David Carroll Challener, Raleigh, NC (US);
Steven Dale Goodman, Raleigh, NC (US);
James Patrick Hoff, Raleigh, NC (US);
David Rivera, Durham, NC (US);
Randall Scott Springfield, Chapell Hill, NC (US);
David Carroll Challener, Raleigh, NC (US);
Steven Dale Goodman, Raleigh, NC (US);
James Patrick Hoff, Raleigh, NC (US);
David Rivera, Durham, NC (US);
Randall Scott Springfield, Chapell Hill, NC (US);
Lenovo (Singapore) Pte. Ltd., Singapore, SG;
Abstract
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.