QUICker Connection Establishment with Out-Of-Band Validation Tokens
2019
QUIC is a secure transport protocol that improves the performance of HTTPS. An initial QUIC handshake that enforces a strict validation of the client’s source address requires two round-trips. In this work, we extend QUIC’s address validation mechanism by an out-of-band validation token to save one round-trip time during the initial handshake. The proposed token allows sharing an address validation between the QUIC server and trusted entities issuing these tokens. This saves a round-trip time for the address validation. Furthermore, we propose distribution mechanisms for these tokens using DNS resolvers and QUIC connections to other hostnames. Our proposal can save up to 50% of the delay overhead of an initial QUIC handshake. Furthermore, our analytical results indicate that 363.6 ms in total can be saved for all connections required to retrieve an average website, if a round-trip time of 90 ms is assumed.
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