Microsoft patents secure way to share security settings between chip parts
Microsoft describes a method for safely sending security settings from one small chip part to another inside a processor. It uses a random number to hide the data and create a digital signature, ensuring the settings have not been tampered with before the second chip applies them.
In the filing’s own words
Improved security techniques for multichip may include data masking and integrity verification for inter-chiplet communications. At a primary chiplet, a pseudo-random number may be generated and used as a cryptographic salt. The cryptographic salt may be used to mask security configuration information, and the salt may also be used to generate a signature of the masked configuration information. A security data package including the cryptographic salt, the masked configuration information, and the signature may be sent from the primary chiplet to a secondary chiplet over an inter-chiplet communication link. The secondary chiplet may then verify the integrity of the masked configuration information using the salt and the signature, and the configuration information can be unmasked based on the salt. If the integrity is verified, a security state of the secondary chipset may be adjusted based on the unmasked security configuration information.
What exactly they claim (claim 1)
1. A method for securely distributing security configuration data between a primary chiplet and a secondary chiplet within an integrated circuit device package, comprising: generating, by a pseudorandom number generator in the primary chiplet, a cryptographic salt; masking, by a masking function of the primary chiplet, the security configuration data for the secondary chiplet based on the cryptographic salt to generate masked configuration data; generating a signature of the masked configuration data based on the cryptographic salt; and sending, to the secondary chiplet, a security data package including the cryptographic salt, the masked configuration data, and the signature.
Facts
- Company
- Microsoft (MICROSOFT TECHNOLOGY LICENSING, LLC)
- Official title
- SECURE DISTRIBUTION OF DEVICE SECURITY CONFIGURATIONS
- Publication number
- US20260268027A1
- Application number
- 19075683
- Filed
- Mar 10, 2025
- Published
- Sep 10, 2026
- Inventors
- 1
- Claims
- 20
Classified under
G06F 21/72 Physics & computingG06F 21/64 Physics & computingMore from Microsoft in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.