论文标题
KAFHCA：通过频率碰撞的键建立
KaFHCa: Key-establishment via Frequency Hopping Collisions
论文作者
论文摘要
由家庭自动化，工业和军事场景使用的大规模部署物联网设备需要通过创新的解决方案来实现高安全性和隐私标准。本文提出了KAFHCA，这是一种无加密的协议，该协议通过独立于无线电通道状态而将随机频率碰撞和源不可区分来生成共享的秘密密钥。尽管其他解决方案将秘密比特率的产生与当前的无线电通道条件联系起来，因此在静态环境中变得不可行，但KAFHCA保证与渠道条件独立于相同的秘密比特率。 KAFHCA通过发射器和无线电频谱中的接收器的随机碰撞产生共享的秘密，并在褪色现象上利用了实现源的不可区分性，从而阻止未经授权的窃听者推断钥匙。所提出的解决方案（几乎）与对手位置无关，在通道褪色的保守假设（σ= 8dB）下起作用，并且能够生成一个秘密键的128位秘密钥匙，而传播率少于564。
The massive deployment of IoT devices being utilized by home automation, industrial and military scenarios demands for high security and privacy standards to be achieved through innovative solutions. This paper proposes KaFHCa, a crypto-less protocol that generates shared secret keys by combining random frequency hopping collisions and source indistinguishability independently of the radio channel status. While other solutions tie the secret bit rate generation to the current radio channel conditions, thus becoming unpractical in static environments, KaFHCa guarantees almost the same secret bitrate independently of the channel conditions. KaFHCa generates shared secrets through random collisions of the transmitter and the receiver in the radio spectrum, and leverages on the fading phenomena to achieve source indistinguishability, thus preventing unauthorized eavesdroppers from inferring the key. The proposed solution is (almost) independent of the adversary position, works under the conservative assumption of channel fading (σ = 8dB), and is capable of generating a secret key of 128 bits with less than 564 transmissions.
