Tool searches illegal images based encrypted database




Scientists from the University of Twente have developed a system that allows the police or internet providers can compare illegal photos stored in an encrypted database. Photographs on the Internet Until now, the comparison is not yet without the privacy infringement.

Currently, the police in investigating illegal images, such as child pornography images, all using a standard database where images are not real, but hashes. The police may hashes of images that are found on USB sticks or hard drives with those of the database and matches the police know that it is the same illegal images. The problem is that the database can be used also to find on the Internet is not used according to the University of Twente.

If the hash values, ie falling into the wrong hands, criminals can use this information to make their photos. Untraceable Researchers at the University of Twente have created a system based on an encrypted database, which the police and other parties may also internet search. If criminals get their hands on the database, this would cause any problems.

“It works based on homomorphic encryption , “says researcher Peter Andreas at Tweakers. “It allows you to perform certain calculations on encrypted data without having to decrypt to get results.” The system he is working with colleagues, makes it possible to encrypt, and then the police can use them or even to other parties, such as internet, can hand yourself. Database of police “It is a relatively new form of encryption, which is resistant to cracking,” says Peter. The encryption would hardly affect the speed of the match. “Large amounts of hashes can be compared in milliseconds.”

The system displays a report after comparing with the number of matches. Only then need to pass this number to decrypt. Committed police It is therefore better for the privacy of online users, the researchers said, because to decrypt any photos need to be recognized. According to Peter, the Dutch police major interest in the system and we work together on one device. International companies would also have shown interest.


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