Verifiable Digital Document Transfer Chain Using Cryptographic Certificates
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Solution Overview
Problem
Existing systems lack a secure and verifiable method to track the chain of ownership and transfer of digital documents, making it difficult to prove authenticity and provenance, and are vulnerable to fraudulent transactions like phishing.
Innovation Solution
A method where each controller of a digital document generates and encrypts a certificate with their private key, creating a chain of transfer that includes conditions and unique identifiers, allowing for public verification and preventing forgery or repudiation, using public key infrastructure for secure transfer and ownership tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional document transfer methods are used, then document transfer is simple and quick, but the chain of ownership cannot be verified and is vulnerable to fraud
Solution Approach 1:
The ownership verification process is segmented into discrete certificate units, where each transfer creates a separate cryptographic certificate that can be independently verified. This segmentation allows the complex verification process to be broken down into manageable, verifiable components rather than requiring verification of the entire ownership history at once.
Solution Approach 2:
Cryptographic certificates are generated and attached to documents in advance of transfer, establishing the ownership chain before disputes or fraud attempts occur. This preliminary action ensures that verification data is already in place, eliminating the need for complex real-time verification during transfer operations.
2Reliability
If digital signatures are used to prove authenticity, then some verification capability is provided, but the system remains vulnerable to phishing and repudiation
Solution Approach 1:
Each ownership certificate is nested within the previous certificate, creating a nested chain where each certificate contains and references the prior state. This nested structure ensures that any attempt at phishing or repudiation would require compromising multiple nested layers simultaneously, dramatically increasing the security barrier against such attacks.
Solution Approach 2:
The system applies preliminary anti-action by pre-establishing cryptographic proofs of ownership and transfer conditions before any transfer occurs. These pre-established certificates create an immutable record that prevents subsequent repudiation or phishing attempts, as the ownership state is already cryptographically locked in place.
3Reliability
If a verifiable chain of transfer is implemented with cryptographic certificates, then fraud is prevented, but the complexity of document transfer increases
Solution Approach 1:
The cryptographic certificate system operates autonomously without requiring manual verification intervention. Each certificate self-contains the necessary verification data and cryptographic proofs, allowing automated validation of the ownership chain without human oversight. This self-service capability maintains fraud prevention while reducing operational complexity.
Solution Approach 2:
Cryptographic certificates serve as intermediary objects that mediate between transfer parties, carrying all necessary verification information without requiring direct trust relationships or complex verification protocols between parties. This intermediary mechanism simplifies the transfer process by replacing complex mutual verification with simple certificate validation.
Data Source
AI summary
Methods and apparatus, including computer systems and program products, related to techniques for creating a chain of transfer for a digital document in which every transferor and transferee participates in the transfer. A first entity, e.g., an offeror with current control of the document, generates an offeror certificate associated with the digital document, and encrypts the offeror certificate with the offeror's private key. The offeror transmits the encrypted offeror certificate to a second entity, e.g., an offeree that will be the subsequent controller of the document. The offeree generates an offeree certificate from the offeror certificate, encrypts the offeree certificate with the offeree's private key, and transmits the encrypted offeree certificate to the offeror. When the offeror receives the offeree certificate, the offeror adds the offeree to a chain of transfer for the document and generates a transfer certificate for the offeree.