naa a22 4500 510796567 CHVBK 20180411083338.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11277-013-1159-z doi (NATIONALLICENCE)springer-10.1007/s11277-013-1159-z Coluccia Angelo Innovation Engineering Department, University of Salento, via Monteroni, 73100, Lecce, Italy aut Rethinking Stream Ciphers: Can Extracting be Better than Expanding? [Elektronische Daten] [Angelo Coluccia] In this paper the feasibility of an alternative approach to construct stream ciphers is discussed by revisiting an old friend, i.e. the popular one-time pad. The idea is that the rationale underlying the one-time pad—which is notoriously unpractical in pure form due to the need of massive secret key exchange—might be translated into practical cryptosystems that are different from conventional stream ciphers. In alternative to the usual pseudo-random keystream generation approach (expansion), a "dual” approach based on sampling of a much longer sequence (extraction) could be conceivable nowadays due to the ready availability of sufficiently large memory resources, even in mobile devices such as PDAs, smartphones and tablets. The paper presents this idea, analyzing its pros and cons versus the classical one-time pad and conventional stream ciphers. Some practical systems that could implement the extraction paradigm are also envisioned. Finally, it is presented a real prototype of a IEEE 802.15.4-based wireless network, developed in software-defined radio by means of the GNU Radio/USRP framework, where nodes can exchange packets with virtually perfect secrecy without requiring a private pad dissemination. Springer Science+Business Media New York, 2013 Stream ciphers nationallicence One-time pad nationallicence Sampling nationallicence Wireless Personal Communications Springer US; http://www.springer-ny.com 73/1(2013-11-01), 77-94 0929-6212 73:1<77 2013 73 11277 https://doi.org/10.1007/s11277-013-1159-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1159-z text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Coluccia Angelo Innovation Engineering Department, University of Salento, via Monteroni, 73100, Lecce, Italy aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 73/1(2013-11-01), 77-94 0929-6212 73:1<77 2013 73 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer