Encryption methods for restricted data limited in value range

Authors:
Yuji Suga
Affiliations:
Internet Initiative Japan Inc
Venue:
ICCSA'10 Proceedings of the 2010 international conference on Computational Science and Its Applications - Volume Part IV
Year:
2010

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Abstract

For encrypting digital contents such as image data, there is known a secret key encryption method in which a transmitter and a receiver shares a same encrypting key in secret. In case of encrypting a part of image data, it is necessary to cautiously handle standardized format, so as not to generate a encrypted data outside defined value ranges. I propose a new encryption method using a conventional cipher algorithm and introduce conversion rule for each standard such as JPEG 2000 and PNG.