TEP: Secure In-Band Wireless Pairing

Tamper-Evident Pairing (TEP) is the first wireless pairing protocol that works in-band, with no pre-shared keys, and protects against MITM attacks. TEP relies on a Tamper-Evident Announcement (TEA) mechanism, which guarantees that an adversary cannot tamper with either the payload in a transmitted message, or with the fact that the message was sent. We formally proved that the design protects from MITM attacks. Further, we implemented a prototype of TEA and TEP for the 802.11 wireless protocol using off-the-shelf WiFi devices, and showed that TEP is practical on real-world 802.11 networks and devices.

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