1 year ago

Presented by Jason A Donenfeld FOSDEM 2017


Stealth ▪ Some aspects

Stealth ▪ Some aspects of WireGuard grew out of an earlier kernel rootkit project. ▪ Should not respond to any unauthenticated packets. ▪ Hinder scanners and service discovery. ▪ Service only responds to packets with correct crypto. ▪ Not chatty at all. ▪ When there’s no data to be exchanged, both peers become silent.

Solid Crypto ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ We make use of Trevor Perrin’s Noise Protocol Framework – ▪ Developed with much feedback from WireGuard motivations. ▪ Custom written very specific implementation of NoiseIK for the kernel. Perfect forward secrecy – new key every 2 minutes Avoids key compromise impersonation Identity hiding Authenticated encryption Replay-attack prevention, while allowing for network packet reordering Modern primitives: Curve25519, Blake2s, ChaCha20, Poly1305, SipHash2-4 Lack of cipher agility!

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