Invention Grant
- Patent Title: Secure DRM-agnostic key rotation
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Application No.: US17302523Application Date: 2021-05-05
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Publication No.: US11550882B2Publication Date: 2023-01-10
- Inventor: Debra Hensgen , Charles Stevens
- Applicant: OpenTV, Inc.
- Applicant Address: US CA San Francisco
- Assignee: OpenTV, Inc.
- Current Assignee: OpenTV, Inc.
- Current Assignee Address: US CA San Francisco
- Agency: Schwegman Lundberg & Woessner, P.A.
- Main IPC: H04L9/08
- IPC: H04L9/08 ; G06F21/10 ; H04N21/262 ; H04N21/266 ; H04N21/8355 ; G06F21/60 ; G06F21/62 ; H04L9/40

Abstract:
Systems and methods for managing provisioning of keys prior to a key rotation are provided. A license server generates a license that is associated with a renewal time. The renewal time is a time that is prior to a key rotation time, and triggers a receiver device to send a renewal request prior to the key rotation time. The renewal time may be a randomized time prior to the key rotation time that differs for different receiver devices. The license is transmitted to the receiver device. The license server then receives a renewal request from the receiver device that is triggered at the renewal time. The license server generates a next license that comprises a next key, whereby the next key is a decryption key for decrypting the encrypted signal after the key rotation time. The next license is transmitted to the receiver device prior to the key rotation time.
Public/Granted literature
- US20210256098A1 SECURE DRM-AGNOSTIC KEY ROTATION Public/Granted day:2021-08-19
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