Security Key Method In Semiconductor Manufacturing

• US 20100215179A1
• Filed: 01/30/2007
• Published: 08/26/2010
• Est. Priority Date: 01/31/2006
• Status: Active Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Crossno, Frances, Bhalla, Vijay, Atwood, Julie, Rickert, Jeanne, DiGennaro, Meimei, Jamieson, Georges, Fowler, Christopher H., Russell, Edward J., Greneaux, Ty
• Application Number:
  US11/669,001
• Publication Number:
  US 20100215179A1
• Time in Patent Office: Days
• US Class Current: 380/278
• CPC Class Codes: H04L 2209/26 Testing cryptographic entity, e.g. testing integrity of encryption key or encryption algorithm
• CPC Class Codes: H04L 63/068 using time-dependent keys, e.g. periodically changing keys cryptographic mechanisms or cryptographic arrangements for controlling usage of secret information H04L9/088
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying

Abstract

The management of customer security keys by an integrated circuit manufacturer with automated material tracking among multiple circuit testers at multiple sites for programming keys into circuits. Limited key change methods plus sufficient key statuses provides processes for key handling.

Claims

1. A method of managing customer keys for integrated circuit manufacturing with programmed keys, comprising the steps of:

(a) providing customer information fields in a manufacturing system control including a customer part number and a key change method;

(b) providing a key status for a set of keys;

(c) providing a plurality of key security compromise responses, said responses dependent upon said key change method and said key status for a set of keys, wherein said key varies per customer order; and

(d) providing distribution of keys to manufacturing sites for programming.

2. The method of claim 1, wherein said key change method is selected from the group consisting of (i) customer-part-number-based key change and (ii) lot-based key change.

3. The method of claim 1, wherein said status is selected from the group consisting of (i) received, (ii) verification, (iii) ready, (vi) active, and (v) obsolete

4. The method of claim 1, further comprising:

(a) providing key inventory alerts for customer submission of additional keys.

5. The method of claim 1, further comprising:

(a) providing key verification selected from the group consisting of (i) sample testing by customer, (ii) simulation test by manufacturer, and (iii) none.