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Visual-cryptography-based visible anti-copying technique

A visual password and anti-copying technology, which is applied in a field of decryption devices, can solve problems such as unavoidable intentional copying, and achieve the effect of preventing intentional or unintentional copying, low cost, and convenient visual area

Active Publication Date: 2012-09-12
刘峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this type of technology is that intentional copying cannot be avoided, and the copyer can choose to use a copying device that is not equipped with an anti-copying device to copy

Method used

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  • Visual-cryptography-based visible anti-copying technique
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  • Visual-cryptography-based visible anti-copying technique

Examples

Experimental program
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Embodiment Construction

[0029] If the transparent film involved in the present invention is printed by a laser printer, it needs high temperature resistance, and polyester film can be selected for use. If you use an inkjet printer to print, you can use ordinary transparent plastic paper.

[0030] One of embodiment:

[0031] Use the present invention on credit cards. Credit card numbers are sensitive information. Currently, the card numbers of credit cards used in China are all printed on the credit cards in clear text. In addition, there is a three-digit number on the back of the credit card, which is used as authentication information, and is usually printed on the credit card in plain text. Since the credit card needs to be shown when paying, this kind of information is easily stolen by hidden cameras or directly seen by malicious people. loss. The invention can be used to protect the credit card number and the three-digit authentication number of the credit card. After being protected by the ...

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PUM

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Abstract

The invention provides an efficient and safe visible anti-copying technique which has low costs. The technique is based on the visual cryptography principles. By printing two sharing pictures of the visual cryptography program on a transparent film with a certain thickness according to a specific way, the cryptic pictures is visible from a certain offset angle instead of from the front of the paper, therefore preventing the pictures from being copied by equipments such as copying machines and scanners. As shown in the following picture, the pictures seen from right above and from the side of the anti-copying transparent film manufactured by the technique of the invention are totally different, wherein the picture can be clearly seen from the side face while the picture can not be seen or can be vaguely seen from the right above. The technique is applicable to the prevention of illegal copying of plane pictures and texts, therefore effectively avoiding forgery; to the prevention of intentionally or unintentionally peeping and covert photography, protecting privacy; and has low cost, applicable to extensively issued plane image-text carriers such as paper money, credit cards, negotiable securities, bills, identity cards and the like.

Description

Background technique [0001] With the continuous upgrading of copying technology, the resolution of copiers and scanners has been continuously improved, and some such as banknotes, securities, bills, etc. are easy to be forged by illegal copying, and some of them have even reached the point of being fake. These counterfeit copies will bring great losses to our country, enterprises and individuals, so it is of great significance to develop effective anti-copying technology. In addition, for example, the card number of a personal credit card, the three-digit authentication number on the back of the credit card, and the ID card number are all personal private information. On the credit cards and second-generation ID cards currently used in my country, all information is printed on the surface, which is easy Being peeped and photographed intentionally or unintentionally, privacy protection is not enough. [0002] Currently known anti-copying technologies include 4 categories, refer...

Claims

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Application Information

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IPC IPC(8): B41M5/00B41M3/14
CPCG09C5/00
Inventor 刘峰钱丽娜
Owner 刘峰
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