Patent · US Active

Methods for coordinating access to memory from at least two cryptography secure processing units

US7873830B2 · kind B2 · utility

9Cited by

10References

19Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Camil Fayad · Poughkeepsie, US
John K. Li · Woodstock, US
Siegfried Sutter · Eppelheim, DE

Key dates

Filing date	Jan 13, 2006
Grant date	Jan 18, 2011
Priority date	—
Expiry date	Oct 31, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG06F21/79
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Electronic circuit chips which include cryptography functions are arranged in multichip configurations through the utilization of a shared external memory. Security of the chips is preserved via a handshaking protocol which permits each chip to access limited portions of the memory as defined in a way that preserves the same high security level as the tamper proof chips themselves. The chips may be operated to work on different tasks or to work on the same task thus providing a mechanism for trading off speed versus redundancy where desired.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.