Wireless Information-Theoretic Security

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

M. Bloch (Autor) Outra; J. Barros (Autor) FEUP; M. R. D. Rodrigues (Autor) Outra; S. W. McLaughlin (Autor) Outra

Revista

Título: IEEE Transactions on Information Theory

Vol. 54 Nº 6

Páginas: 2515-2534

ISSN: 0018-9448

Editora: IEEE

Indexação

ISI Web of Science

INSPEC

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia electrotécnica, electrónica e informática

CORDIS: Ciências Tecnológicas

Outras Informações

DOI: 10.1109/TIT.2008.921908

Abstract (EN): This paper considers the transmission of confidential data over wireless channels. Based on an information-theoretic formulation of the problem, in which two legitimates partners communicate over a quasi-static fading channel and an eavesdropper observes their transmissions through a second independent quasi-static fading channel, the important role of fading is characterized in terms of average secure communication rates and outage probability. Based on the insights from this analysis, a practical secure communication protocol is developed, which uses a four-step procedure to ensure wireless information-theoretic security: (i) common randomness via opportunistic transmission, (ii) message reconciliation, (iii) common key generation via privacy amplification, and (iv) message protection with a secret key. A reconciliation procedure based on multilevel coding and optimized low-density parity-check (LDPC) codes is introduced, which allows to achieve communication rates close to the fundamental security limits in several relevant instances. Finally, a set of metrics for assessing average secure key generation rates is established, and it is shown that the protocol is effective in secure key renewal-even in the presence of imperfect channel state information

Idioma: Inglês

Tipo (Avaliação Docente): Científica