Trusted Third Party Digital Signature Method
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Solution Overview
Problem
The challenge lies in creating a legal signature for digital documents without relying on electronic signatures, especially when the signatory does not want to install an electronic signature on their workstation, while ensuring strong personal identification, integrity, and uniqueness of the signature.
Innovation Solution
A method involving registration of digital identities, authorization for correspondence, encryption of documents, notification, access detection, and electronic signing by a trusted third party using their private key, which constructs and archives reports containing authentication, sealing, and time-stamping data to establish a legal signature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic signature is used, then legal signature requirement is met, but installation complexity increases
Solution Approach 1:
The patent introduces a trusted third party as an intermediary that generates electronic signatures on behalf of the signatory. This mediator (trusted third party) performs the cryptographic operations and signature generation, eliminating the need for the end user to install or manage electronic signature software directly. The trusted third party acts as a bridge between the signatory and the digital document, providing the signature service without requiring installation on the user's workstation.
2Ease of operation
If electronic signature software is installed, then signature capability is obtained, but system resource consumption increases
Solution Approach 1:
The system enables self-service through the trusted third party infrastructure. The trusted third party automatically generates signatures, manages cryptographic keys, and handles signature validation without requiring the end user to actively manage signature software or consume system resources for signature operations. The user simply provides authentication credentials, and the trusted third party handles all computationally intensive operations externally.
3Measurement precision
If digital certificate is used for identification, then personal identification is established, but security vulnerability increases
Solution Approach 1:
The patent implements preliminary action through pre-registration and pre-authentication processes. Before any signature operation, the user must complete a registration process with the trusted third party, providing identification documents and establishing a secure credential linkage. This preliminary setup creates a verified association between the user's physical identity and digital credentials, which then protects against unauthorized use even if the device is compromised, as the credentials are tightly bound to the registered individual.
Data Source
AI summary
A method for signing a document to be transmitted between two correspondents, i.e. a sender and an addressee, including recording the sender and the addressee of the document for the allocation of a digital identity thereto; authorizing by the addressee a correspondence with the sender; ciphering the document; indicating to the addressee that the document is available; detecting an access to the document by the addressee; generating an electronic report indicating the delivery of the document, the document-delivery electronic report including a set of data associated with the transmission of the document to the addressee, the set including identification of elements concerning the addressee authentication, the sealing of the document, the access to the document by the addressee and the time-stamping of the access to the document by the addressee; and electronically signing, by a reliable third-party using the private key thereof, the document-delivery electronic report.