Organization-specific encryption key storage method and storage system

The method and system for organization-specific encryption keys securely manage encryption keys for each submitter and recipient, reducing information leakage risk and costs by using unique keys and passphrases, enhancing convenience and security in data transfer systems.

JP7762911B2Active Publication Date: 2025-10-31ATSYSTEM CO LTD
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Patent Information

Application Number
JP2022026188
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-02-22
Publication Date
2025-10-31
Estimated Expiration
2042-02-22

AI Technical Summary

Technical Problem

Existing data transfer systems face challenges in preventing information leakage, particularly when multiple recipients or submitters are involved, leading to increased complexity, human error, and management costs, while existing solutions like common key encryption complicate the process and require transmission of passphrases, which is inconvenient and costly.

Method used

A method and system for storing organization-specific encryption keys, where encryption keys are managed separately for each submitter and recipient using unique public and private keys, with passphrases, ensuring that neither the server administrator nor the server can decrypt the keys, and data is encrypted and decrypted using these keys.

Benefits of technology

This approach reduces the risk of information leakage, enhances convenience for both submitters and recipients, and decreases transmission and management costs without compromising security, by ensuring that only the respective passphrases are needed for decryption, thus improving overall security and usability.

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Abstract

To realize further reduction of information leakage risk by safely storing an encryption key and reducing the risk of information leakage while improving convenience for a recipient and a submitter and reducing transmission and management costs without compromising the effectiveness of information leakage prevention measures when data encrypted with an encryption key is stored in a server connected via a network to one or more submitter terminals that are data submitters and have a submitter ID, and one or more recipient terminals that are recipients of the data and have a recipient ID.SOLUTION: An encryption key is encrypted and stored using a generated submitter's public key and a generated recipient's public key, and is encrypted and stored using a submitter's passphrase generated by a submitter's private key and a recipient's passphrase generated by a recipient's private key, and each of the passphrases is automatically notified to the submitter contact and recipient contact and is not stored in a system.SELECTED DRAWING: Figure 12
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