Definition: A private-key cryptosystem can be obtained using the visual cryptography concepts or perfect-reconstruction based image secret sharing.
A (2, 2)-scheme is the most popular solution within the (k, n) framework due to its common acceptance as a private-key cryptosystem [1], [2], [3]. Such a cryptographic solution encrypts the secret image into two noise-like shares. One of the two generated shares can be viewed as a private share or private-key, and is kept by the owner. The other share represents a public share which can be transmitted over an untrusted communication channel. The secret image is reconstructed only if both the public and private shares are used for decryption.
A private-key cryptosystem can be obtained using the visual cryptography concepts [1] or perfect-reconstruction based image secret sharing [2]. Both these solutions encrypt each pixel of the secret image into a block of share pixels and because of their expansion nature, such solutions produce the...
This is a preview of subscription content, log in via an institution to check access.
References
G. Ateniese, C. Blundo, A. de Santis, and D.-G. Stinson, “Visual Cryptography for General Access Structures,” Information and Computation, Vol. 129, No. 2, September 1996, pp. 86–106.
R. Lukac and K.-N. Plataniotis, “Bit-Level Based Secret Sharing for Image Encryption,” Pattern Recognition, Vol. 38, No. 5, May 2005, pp. 767–772.
R. Lukac and K.-N. Plataniotis, “A Cost-Effective Private-Key Cryptosystem for Color Image Encryption,” Lecture Notes in Computer Science, Vol. 3514, May 2005, pp. 679–686.
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer Science+Business Media, Inc.
About this entry
Cite this entry
(2006). Private-Key Cryptosystem. In: Furht, B. (eds) Encyclopedia of Multimedia. Springer, Boston, MA. https://doi.org/10.1007/0-387-30038-4_194
Download citation
DOI: https://doi.org/10.1007/0-387-30038-4_194
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-387-24395-5
Online ISBN: 978-0-387-30038-2
eBook Packages: Computer ScienceReference Module Computer Science and Engineering