Providing digital certificates

This invention describes a system where a central server helps a user retrieve a digital certificate from their mobile phone. When another device requests a certificate, the server contacts the user's phone. The phone then prompts the user for a specific passcode, which must match an internal offset. If correct, the phone releases the certificate to the server, which forwards it for use in signing or encrypting data.

Why it matters: Filed before widespread hardware-backed secure elements and biometric authentication became standard on mobile devices. These advancements now provide more robust and user-friendly protection for digital certificates than the described passcode offset, making the core system more secure and practical to implement.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedServer, mobile app, cryptographic logic

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