Invention Grant
- Patent Title: Sharing a secret using polynomial division over GF(Q)
- Patent Title (中): 使用GF(Q)上的多项式除法共享一个秘密
-
Application No.: US12197082Application Date: 2008-08-22
-
Publication No.: US08345861B2Publication Date: 2013-01-01
- Inventor: James P. Schneider
- Applicant: James P. Schneider
- Applicant Address: US NC Raleigh
- Assignee: Red Hat, Inc.
- Current Assignee: Red Hat, Inc.
- Current Assignee Address: US NC Raleigh
- Agency: Lowenstein Sandler PC
- Main IPC: H04L29/06
- IPC: H04L29/06

Abstract:
A method and system for distributing a secret are described. In one embodiment, the secret is represented by a secret polynomial of degree d over GF(q) constructed with a prime or a power of a prime. The secret polynomial is then embedded into an extension polynomial of degree m that is greater than d. The extension polynomial is divided by n coprime divisor polynomials over GF(q), using arithmetic defined for polynomials over GF(q), to generate n shares of the secret. Each share includes one of the divisor polynomials and a corresponding remainder. These n shares are distributed among a plurality of cooperating entities for secret sharing.
Public/Granted literature
- US20100046739A1 SHARING A SECRET USING POLYNOMIAL DIVISION OVER GF(Q) Public/Granted day:2010-02-25
Information query