Picture Encryption via Disturbance Data and Dual-Key Segmentation
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Solution Overview
Problem
Existing picture encryption methods are insecure as third terminals can decrypt encrypted pictures using obtained decryption keys, compromising the security of the transmitted data.
Innovation Solution
A method and apparatus that add disturbance data to the raw picture data based on location information, encrypt the data using a first key, and further encrypt the key and location information using a second key, ensuring only the intended receiving device can decrypt the picture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional encryption methods are used where the decryption key is sent separately, then the picture can be decrypted by the receiving device, but the security is compromised because third terminals can intercept both the encrypted picture and decryption key
Solution Approach 1:
The patent segments the decryption process into two distinct parts: a decryption algorithm and separate decryption parameters (first parameter and second parameter). The encrypted picture data is divided into first encrypted data and second encrypted data. This segmentation ensures that even if one part is intercepted, the complete decryption capability cannot be obtained without all components, thereby resolving the security vulnerability while maintaining manageable complexity through modular design.
Solution Approach 2:
The patent introduces disturbance data as an intermediary element that is integrated with the original picture data before encryption. This disturbance data acts as a mediator that obscures the relationship between the original picture and its encrypted form, making it extremely difficult for third terminals to perform meaningful analysis or decryption even if they intercept the encrypted data and parameters.
2Reliability
If disturbance data is added to raw picture data and multiple encryption layers are applied, then security against third terminal interception is improved, but the encryption and decryption process becomes more complex
Solution Approach 1:
The patent divides the encryption process into distinct segments: adding disturbance data to raw picture data, encrypting the combined data with a first encryption key to produce first encrypted data, and encrypting the first encryption key with a second encryption key to produce second encrypted data. This segmentation allows each step to be independently implemented and managed, reducing overall complexity while achieving layered security.
Solution Approach 2:
The patent performs preliminary actions by pre-generating disturbance data and pre-establishing the relationship between encryption keys and their encrypted forms before actual picture transmission. The receiving device is pre-configured with the decryption algorithm, allowing it to efficiently process the multi-layer encryption without excessive computational burden during real-time operation.
Data Source
AI summary
The present disclosure relates to the field of computer technologies and it discloses a method for encrypting a picture performed at a sending device, the method including: obtaining, by a sending device raw data of a to-be-encrypted picture, a first key, a second key, and location information that is used for adding disturbance data to the raw data; generating the disturbance data, and adding the disturbance data to the raw data according to the location information, to obtain first data; encrypting the first data by using the first key, to obtain the second data, and encrypting the first key and the length of the disturbance data by using the second key, to obtain first encrypted data; and sending the second data, the first encrypted data, and the second key to a receiving device.