National Institute of Standards and Technology における超伝導研究及び生活

The objective of this paper is to give a comprehensive introduction to applied cryptography with an engineer or computer scientist in mind. The emphasis is on the knowledge needed to create practical systems which supports integrity, confidentiality, or authenticity. Topics covered includes an introduction to the concepts in cryptography, attacks against cryptographic systems, key use and handling, random bit generation, encryption modes, and message authentication codes. Recommendations on algorithms and further reading is given in the end of the paper. This paper should make the reader able to build, understand and evaluate system descriptions and designs based on the cryptographic components described in the paper.

[서평]「Applied Cryptography」

A new 1D chaotic system for image encryption

A chaos-based symmetric image encryption scheme using a bit-level permutation

A new color image encryption using combination of the 1D chaotic map

Multi-image encryption by circular random grids

Compression-unimpaired batch-image encryption combining vector quantization and index compression

A round- and computation-efficient three-party authenticated key exchange protocol

It is the well-known visual secret sharing (VSS) technique that encrypts a secret image into several share images and, later, decrypts the secret by stacking the share images and recognizing by the human visual system. Due to the perfect secrecy, VSS is one of well-candidate for achieving secure e-commerce. Furthermore, the other visual secret sharing technique is constructed by random grids. The main advantages of VSS by adopting random grids compared with VC include no pixel expansion, and no cost of sophisticated codebook design. In this paper, the authors present the new scheme which encrypts two secret images into two random grids without any pixel expansion and, later, decrypts the original secrets by directly stacking two random grids in an additional way of rotating one random grid at 90, 180 or 270 degrees. The proposed scheme not only has no pixel expansion so that the overhead of storage and communication can be reduced but also raises the capacity of secret communication.

http://casd.csie.ncku.edu.tw/Object-Oriented_Software_Engineering/Multiple-Image%20Encryption%20by%20Rotating%20Random%20Grids.pdf

Tzung-Her Chen

Papers

Multi-image encryption by circular random grids

Compression-unimpaired batch-image encryption combining vector quantization and index compression

A round- and computation-efficient three-party authenticated key exchange protocol

Multiple-Image Encryption by Rotating Random Grids

Owner-customer right protection mechanism using a watermarking scheme and a watermarking protocol