US Patent 8238552 Password key derivation system and method

Patent 8238552 was granted and assigned to Guidance Software on August, 2012 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Guidance Software

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

82385520

Patent Inventor Names

Dominik Weber0

Date of Patent

August 7, 2012

Patent Application Number

123713700

Date Filed

February 13, 2009

Patent Primary Examiner

‌

Kambiz Zand

Patent abstract

A password-based key derivation function includes a sub-function that gets executed multiple times based on an iteration count. A key derivation module computes the iteration count dynamically with each entered password. The iteration count is computed as a function of the password strength. Specifically, the weaker the password, the higher the iteration count; but the stronger the password, the smaller the interaction count. This helps strengthen weaker passwords without penalizing stronger passwords.