Methods, software programs, and systems for electronic information security

This invention describes a special digital file, called a strongbox container, designed to keep other digital files secure. It works by encrypting the main data file with a unique key, then encrypting that key with the owner's public key. The strongbox also includes an encrypted history log and a digital signature from the creator, all bundled together to ensure only authorized users can access the content and its history.

Why it matters: Filed before widespread cloud storage and the proliferation of personal data across many devices. The claims describe a self-contained secure file that could provide user-controlled encryption for data stored in today's ubiquitous cloud environments, addressing modern privacy and data breach concerns.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedSoftware logic, cryptography, file system integration

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