Image forming equipment
An image and equipment technology, applied in the field of image forming equipment, can solve problems such as no encryption processor
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no. 1 example
[0044] The first embodiment is a digital multifunction device that includes a scanner for digitally reading an image of a document, receives an image signal sent from a personal computer, etc., processes the received image signal and reads it by the scanner. The image signal of the image is written on the photoreceptor by light according to the processed image signal to form an image by electrophotography.
[0045] Encryption systems are roughly classified into common key (symmetric) encryption systems and public key (asymmetric) encryption systems. In a common-key encryption system, the encryption key is the same as the decryption key. On the other hand, in a public key encryption system, an encryption key and a decryption key are different from each other, and one (secret key) can be kept secret and the other (public key) can be disclosed. The common key encryption system is capable of high-speed encryption / decryption, and the first embodiment uses the common key encryption...
no. 2 example
[0059] The second embodiment is an example of the digital multifunction device of the first embodiment described above. In this instance, the paper with memory has two or more memories, the information about the image is stored in the memories with different storage keys, and the information about the image is displayed on the display when the encrypted image is decrypted into the original image. The "information about the image" mentioned here means the title of the image information, the creation date of the image information, the creator of the image information, and the encryption date of the image, but may be other information that can identify the image. Since the composition of the digital multifunction device of the second embodiment is the same as that of the digital multifunction device of the first embodiment described above ( figure 1 ) are the same, so their explanations are omitted.
[0060] Figure 5 The block diagram of shows the flow when this digital multif...
no. 3 example
[0065] The third embodiment is an example of the digital multifunction device of the first embodiment described above. In this instance, the paper with memory has two or more memories, the number of times of output (the number of times the original image is formed by decrypting the encrypted image) is stored in the memory with a different storage key, and when the decrypted image is printed Print a sequence number indicating how many times to output. Since the composition of the digital multifunction device of the third embodiment is the same as that of the digital multifunction device of the first embodiment described above ( figure 1 ) are the same, so their explanations are omitted.
[0066] Figure 7 The block diagram of shows the flow when the digital multifunction device of the present invention outputs the sequence number at the (n+1)th output (formation). In this digital multifunction device, the memory reading unit 110 reads the number n of outputs that have been p...
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