Projector System Password Authentication Mechanism
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Solution Overview
Problem
Host-based projector systems face challenges in achieving high security while maintaining simplified configuration and process, as existing encryption methods require complex hardware and software configurations to decrypt image data in real-time, which contradicts the goal of minimizing projector complexity and development costs.
Innovation Solution
A projector system that includes a password generating unit in the projector, an encryption unit to encrypt the password, and a decryption unit in the information processing apparatus to decrypt the password, allowing only authorized projectors and software to perform image processing, thereby preventing unauthorized use and simplifying the projector's configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data is encrypted and decrypted in real-time using existing methods, then security is improved, but device complexity and process complexity increase significantly
Solution Approach 1:
The patent applies preliminary action by performing encryption before image data transmission. The information processing apparatus encrypts the image data before sending it to the projector, so that the projector only needs to display the encrypted data without performing complex real-time decryption operations. This resolves the contradiction by maintaining security through encryption while avoiding the complexity of real-time decryption hardware and software in the projector.
Solution Approach 2:
The patent extracts the encryption and decryption functions from the projector and places them in the information processing apparatus. By taking out the decryption function from the projector, the system maintains security (encryption is still applied) while significantly reducing the projector's configuration complexity and process load, allowing the projector to function as a simple display device.
2Reliability
If decryption functionality is added to the projector, then security is improved, but productivity and manufacturing cost increase due to complex hardware and software requirements
Solution Approach 1:
The patent extracts the decryption function from the projector and relocates it to the information processing apparatus. This extraction eliminates the need for complex decryption hardware and software in the projector, thereby maintaining security (through encryption in the host system) while significantly improving productivity by simplifying the projector's development, manufacturing, and maintenance processes.
3Device complexity
If the projector performs minimal processing as a host-based projector, then device complexity is reduced, but security against unauthorized use deteriorates
Solution Approach 1:
The patent introduces encrypted image data as an intermediary between the information processing apparatus and the projector. The encryption acts as a mediator that provides security without requiring the projector to perform complex processing. The encrypted data serves as both the security mechanism and the display content, allowing the projector to remain simple while the system as a whole achieves high security through the intermediary encryption layer.
Data Source
AI summary
A projector system includes an information processing apparatus and a projector. The projector includes a device connection unit which enables communication between the information processing apparatus and the projector, a password generating unit which generates a password, and an encryption unit which encrypts the password and outputs the encrypted password to the information processing apparatus through the device connection unit. The information processing apparatus includes a device connection unit which enables communication between the projector and the information processing apparatus, a decryption unit which decrypts the encrypted password input through the device connection unit of the information processing apparatus using a decryption key, and a password determining unit which has functions of determining whether the decrypted decryption password is correct and outputting a signal directing to start the process for projection to be performed by the information processing apparatus in a case where the decrypted password is correct.