Data Encryption Using Device Authentication Keys
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Solution Overview
Problem
Existing data encryption methods include decryption information within the encrypted data, making it possible for hackers to decrypt the data even if it is leaked during communication.
Innovation Solution
A data encryption method using device authentication keys, where only encrypted data is transmitted, and multiple encryption keys are used to reinforce security, with the transmitting device generating an encryption list and selecting an in-use encryption key based on a predetermined rule, and the receiving device generating a decryption list to decrypt the data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decryption information is included in the encrypted data for communication, then the receiving device can decrypt the data, but hackers can also decrypt the data using the same information
Solution Approach 1:
The patent extracts decryption information (authentication keys) from the transmitted data packet. The transmitting device sends only encrypted data without including authentication keys or decryption methods in the transmission. The receiving device already possesses the authentication keys locally, allowing it to decrypt the data without receiving decryption information in the packet, thereby preventing hackers from obtaining decryption capabilities through intercepted packets.
Solution Approach 2:
The patent segments the encryption system into two separate components: encrypted data transmission and authentication key storage. The authentication keys are stored separately in the receiving device's authentication information storage unit, while only the encrypted data is transmitted. This segmentation ensures that even if transmission data is intercepted, the decryption capability remains secure as it is not included in the transmitted information.
2Ease of operation
If a single authentication key is used for data encryption, then the encryption process is simple, but security is weakened if the key is exposed
Solution Approach 1:
The patent implements dynamic authentication keys that are generated based on the authentication result and can be updated over time. The authentication key is not static but is generated fresh for each authentication session, making it difficult for hackers to compromise security through key exposure. The system dynamically creates encryption lists with multiple keys derived from the authentication key, providing both simplicity in operation and enhanced security.
3Reliability
If multiple encryption keys are used to encrypt data, then security is reinforced, but the complexity of key management increases
Solution Approach 1:
The patent merges multiple encryption keys into a unified authentication key that serves as the root for generating all necessary decryption keys. The receiving device stores a single authentication key in its authentication information storage unit, and this single key is used to generate multiple decryption keys as needed. This combining approach maintains high security through multiple keys while simplifying key management by requiring storage and handling of only one master authentication key.
Data Source
AI summary
Method and system of encrypting data using device authentication key disclosed. The system of encrypting data may include a transmitting device, configured to transmit a device identification information to request an authentication and a receiving device, configured to perform the authentication, and to generate an authentication key to provide to the transmitting device when the authentication is successful.