Osnabrück 2002 – scientific programme

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Q: Quantenoptik

Q 432: Poster: Quanteninformation

Q 432.6: Poster

Thursday, March 7, 2002, 16:30–18:30, Schloss

Quantum approaches to information protection — •Guihua Zeng, Carlos Saavedra, and Christoph H. Keitel — Fakultät für Physik, Universität Freiburg, Germany

Information protection essentially involves two aspects, i.e., preventing both eavesdropping and changes of a message [1]. In this poster, an efficient approach to information protection is presented by making use of quantum approaches, i.e., quantum cryptography. In particular, a quantum cryptographic algorithm for information encryption and decryption will be applied to prevent eavesdropping [2] and a quantum signature algorithm will be introduced to prevent an attacker from changing any information [3]. Since these schemes are unconditionally secure, the information can be protected without any drawback on its security. Reference: [1] B. Schneier, Applied Cryptography: protocols, algorithms, and source code in C (John Wiley & Sons, Inc., 1994) [2] G. Zeng, C. Saavedra and C.H. Keitel, Quantum cryptographic algorithm. To be submitted. [3] G. Zeng and C.H. Keitel, An arbitrated quantum signature scheme, arXiv, quant-ph/0109007.