基于哈希方法的物理層認(rèn)證機制

季新生; 楊靜; 黃開枝; 易鳴

doi:10.11999/JEIT160007

基于哈希方法的物理層認(rèn)證機制

doi: 10.11999/JEIT160007

基金項目:

國家863計劃項目(2015AA01A708)，國家自然科學(xué)基金(61379006)，國家青年科學(xué)基金(61501516)

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- 文章訪問數(shù): 1590
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-01-04
- 修回日期: 2016-05-23
- 刊出日期: 2016-11-19

Physical Layer Authentication Scheme Based on Hash Method

Funds:

The National 863 Program of China (2015AA01A708), The National Natural Science Foundation of China (61379006), The National Science Fund for Excellent Young Scholars (61501516)

摘要

摘要: 現(xiàn)有物理層挑戰(zhàn)-響應(yīng)認(rèn)證機制使用無線信道信息掩藏密鑰生成認(rèn)證響應(yīng)，一旦攻擊方獲得合法信道信息，則可直接破解密鑰。針對上述問題，該文借鑒曲線匹配原理，提出一種基于哈希方法的物理層認(rèn)證機制。首先，認(rèn)證雙方提取無線信道特征，并和認(rèn)證密鑰組合得到初始認(rèn)證向量，該向量被等效為一條曲線；隨后，采用具有容錯性的單向哈希函數(shù)將該曲線映射為低維的哈希矢量，用作認(rèn)證響應(yīng)；最后，認(rèn)證方根據(jù)需求設(shè)置認(rèn)證門限，并根據(jù)響應(yīng)的匹配結(jié)果進行判決。性能分析表明，所采用的哈希方法實質(zhì)為欠定方程組，攻擊方無法根據(jù)低維哈希矢量還原曲線信息，從而無法破解密鑰；仿真結(jié)果表明，在攻擊方竊取了合法信道信息的條件下，在4 dB時，現(xiàn)有挑戰(zhàn)-響應(yīng)機制攻擊率約為0.5，該文所提機制可實現(xiàn)攻擊率小于10-5 。
- 物理層 /
- 認(rèn)證 /
- 曲線匹配 /
- 哈希方法
Abstract: To solve the problem of key leakages in existing physical layer challenge-response authentication schemes, a physical layer authentication scheme based on hash method is proposed. The channel characteristics are extracted and linked with the key which can be regarded as a curve. Then a fault-tolerant hash function is employed to map the curve into a response with lower dimension. The authenticator lastly sets the threshold according to the authentication requirement and further to verify the identity of the requester. The hash function is an underdetermined system and attackers can not recover the curve according to the response. Simulation results prove the effectiveness of the scheme whose attack rate is less than10-5 while attack rates for existing schemes are almost 0.5 under the SNR of 4 dB.
- Physical-layer /
- Authentication /
- Curve matching /
- Hash method

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