earticle

영어

In case of transmission of fast and protected information, it is important to carry out two
operations distinctly. The first, is an operation of encryption, which aims to modify the compressed information to make them unreadable to whoever does not have the necessary
authorization to see them (in this paper, we propose give this authorization by using a fingerprint image). The second is an operation of compression which consists in reducing the size of information to be transmitted, by removing redundant information of them. However, these two operations are often carried out separately, although they are strongly bound and one influences on the other. We propose, in this article, to carry out these two operations (compression and encryption) together with a new system able to amalgamate spectral information. This nondestructive spectral fusion, allowing at the same time the compression and the encryption of this information. This system is based on one hand on the rarity of similitude in two different fingerprints and on the second hand on the Discrete Cosine Transformation "DCT", a ransformation used for a long time in JPEG compression.