Analysis of Secret Key Randomness Exploiting the Radio Channel Variability
A few years ago, physical layer based techniques have started to be considered as a way to improve security in wireless communications. A well known problem is the management of ciphering keys, both regarding the generation and distribution of these keys. A way to alleviate such difficulties is to u...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2015/106360 |
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| author | Taghrid Mazloum Alain Sibille |
| author_facet | Taghrid Mazloum Alain Sibille |
| author_sort | Taghrid Mazloum |
| collection | DOAJ |
| description | A few years ago, physical layer based techniques have started to be considered as a way to improve security in wireless communications. A well known problem is the management of ciphering keys, both regarding the generation and distribution of these keys. A way to alleviate such difficulties is to use a common source of randomness for the legitimate terminals, not accessible to an eavesdropper. This is the case of the fading propagation channel, when exact or approximate reciprocity applies. Although this principle has been known for long, not so many works have evaluated the effect of radio channel properties in practical environments on the degree of randomness of the generated keys. To this end, we here investigate indoor radio channel measurements in different environments and settings at either 2.4625 GHz or 5.4 GHz band, of particular interest for WIFI related standards. Key bits are extracted by quantizing the complex channel coefficients and their randomness is evaluated using the NIST test suite. We then look at the impact of the carrier frequency, the channel variability in the space, time, and frequency degrees of freedom used to construct a long secret key, in relation to the nature of the radio environment such as the LOS/NLOS character. |
| format | Article |
| id | doaj-art-0372ee811d1d48749e1ebc2ce733bef0 |
| institution | OA Journals |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-0372ee811d1d48749e1ebc2ce733bef02025-08-20T02:03:17ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772015-01-01201510.1155/2015/106360106360Analysis of Secret Key Randomness Exploiting the Radio Channel VariabilityTaghrid Mazloum0Alain Sibille1LTCI, Télécom ParisTech, CNRS, 46 rue Barrault, 75013 Paris, FranceLTCI, Télécom ParisTech, CNRS, 46 rue Barrault, 75013 Paris, FranceA few years ago, physical layer based techniques have started to be considered as a way to improve security in wireless communications. A well known problem is the management of ciphering keys, both regarding the generation and distribution of these keys. A way to alleviate such difficulties is to use a common source of randomness for the legitimate terminals, not accessible to an eavesdropper. This is the case of the fading propagation channel, when exact or approximate reciprocity applies. Although this principle has been known for long, not so many works have evaluated the effect of radio channel properties in practical environments on the degree of randomness of the generated keys. To this end, we here investigate indoor radio channel measurements in different environments and settings at either 2.4625 GHz or 5.4 GHz band, of particular interest for WIFI related standards. Key bits are extracted by quantizing the complex channel coefficients and their randomness is evaluated using the NIST test suite. We then look at the impact of the carrier frequency, the channel variability in the space, time, and frequency degrees of freedom used to construct a long secret key, in relation to the nature of the radio environment such as the LOS/NLOS character.http://dx.doi.org/10.1155/2015/106360 |
| spellingShingle | Taghrid Mazloum Alain Sibille Analysis of Secret Key Randomness Exploiting the Radio Channel Variability International Journal of Antennas and Propagation |
| title | Analysis of Secret Key Randomness Exploiting the Radio Channel Variability |
| title_full | Analysis of Secret Key Randomness Exploiting the Radio Channel Variability |
| title_fullStr | Analysis of Secret Key Randomness Exploiting the Radio Channel Variability |
| title_full_unstemmed | Analysis of Secret Key Randomness Exploiting the Radio Channel Variability |
| title_short | Analysis of Secret Key Randomness Exploiting the Radio Channel Variability |
| title_sort | analysis of secret key randomness exploiting the radio channel variability |
| url | http://dx.doi.org/10.1155/2015/106360 |
| work_keys_str_mv | AT taghridmazloum analysisofsecretkeyrandomnessexploitingtheradiochannelvariability AT alainsibille analysisofsecretkeyrandomnessexploitingtheradiochannelvariability |