ON THE POWER OF QUANTUM TAMPER-PROOF DEVICES
| Autor: | João Rasga, Paulo Mateus, Nicola Paunkovic, Jan Bouda |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Quantum network
Quantum decoherence Physics and Astronomy (miscellaneous) Computer science 020206 networking & telecommunications 0102 computer and information sciences 02 engineering and technology Cryptographic protocol Computer security computer.software_genre 01 natural sciences Quantum cryptography 010201 computation theory & mathematics Quantum state 0202 electrical engineering electronic engineering information engineering Zero-knowledge proof Quantum information BB84 computer Computer Science::Cryptography and Security |
| Zdroj: | International Journal of Quantum Information. :281-302 |
| ISSN: | 1793-6918 0219-7499 |
| DOI: | 10.1142/s0219749908003542 |
| Popis: | We show how quantum tamper-proof devices (QTPD's) can be used to attack and to develop security protocols. On one hand, we prove that it is possible to transfer proofs of zero-knowledge protocols using QTPD's. This attack can be extended to other security schemes where privacy is important. On the other hand, we present a fair contract signing protocol using QTPD's where there is no communication with Judge during the exchange phase (which is impossible classically). In the latter case, we make use of decoherence in the quantum state of the QTPD to implement a global clock over the asynchronous network. QTPD's seem to be possible to implement with existing quantum hardware, due to the fact that it is hard to isolate quantum memory from interference. These theoretical results contribute to justify the implementation of QTPD's. |
| Databáze: | OpenAIRE |
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