Computer-implemented system and method for trustless zero-knowledge contingent payment
US-2024249280-A1 · Jul 25, 2024 · US
Data processing device
US8958552B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8958552-B2 |
| Application number | US-200913504506-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 29, 2009 |
| Priority date | Oct 29, 2009 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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A certification device 101 encrypts a feature vector for registration by using a random number and a public key which is set to correspond to a secret key in a decryption device 103 . The encrypted feature vector for registration is registered in an authentication device 102 . In authentication, the certification device encrypts a feature vector for authentication by using the public key and a random number. With the two encrypted feature vectors being kept encrypted, the authentication device generates encrypted similarity degree information from which the decryption device can derive the similarity degree between the two feature vectors by a decryption process using the secret key. The decryption device 103 decrypts the encrypted similarity degree information to derive the similarity degree of the plaintext. The authentication device 102 , if the similarity degree is equal to or larger than a threshold, determines that the user is the correct user. The similarity degree can be derived without using the feature vector of the plaintext. Thus, secure identity authentication with a lower possibility of plaintext theft can be realized.
First claim
Opening claim text (preview).
The invention claimed is: 1. A data processing device comprising: a public key storage circuit which stores a public key generated in a decryption device based on a doubly homomorphic encryption algorithm and distributed by the decryption device; an encrypted data storage circuit which stores, as encrypted first data, first data that has been encrypted by an encryption device which holds the public key distributed by the decryption device, by using the public key held in the enc…
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Classifications
Electricity · mapped topic
- H04L9/3073Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8958552B2 cover?
- A certification device 101 encrypts a feature vector for registration by using a random number and a public key which is set to correspond to a secret key in a decryption device 103 . The encrypted feature vector for registration is registered in an authentication device 102 . In authentication, the certification device encrypts a feature vector for authentication by using the public key an…
- Who is the assignee on this patent?
- Hattori Mitsuhiro, Shibata Yoichi, Ito Takashi, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification H04L9/3073. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).