System and method for secure software update

This invention describes a way to securely update software on a device. It works by preparing an update package that includes the new software, a scrambled checksum for it, and a digital signature. The device then uses special keys to verify the signature and unscramble the checksum, ensuring the update is authentic and hasn't been tampered with before installation. The claims specifically focus on the device using a public key to verify a digital signature generated by a private key.

Why it matters: Filed before the widespread proliferation of IoT devices and the rise of sophisticated supply chain attacks made robust, verifiable software updates a critical, rather than optional, feature for nearly all connected systems. The need for foundational security mechanisms like this has become universal.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedSoftware logic, cryptographic key management, secure boot

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