System and method for secure unidirectional messaging

This invention describes a system for sending secure electronic messages in one direction, from a sender to a recipient. It works by having the sender retrieve a verified public key and the correct address for the recipient from a trusted source. The system then uses this key, specifically an RSA-based public key, to ensure the message is private, authentic, and cannot be tampered with or denied, all while using minimal network and computer resources.

Why it matters: Filed before ubiquitous cloud infrastructure and standardized cryptographic libraries simplified the deployment of trusted public key storage and efficient secure messaging. The claims' emphasis on resource-light, secure communication is now more readily achievable with modern computing platforms and network capabilities.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedSoftware logic, cryptography, network protocols, trusted key storage.

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