CSI: inferring mobile ABR video adaptation behavior under HTTPS and QUIC

Mobile video streaming services have widely adopted Adaptive Bitrate (ABR) streaming to dynamically adapt the streaming quality to variable network conditions. A wide range of third-party entities such as network providers and testing services need to understand such adaptation behavior for purposes such as QoE monitoring and network management. The traditional approach involved conducting test runs and analyzing the HTTP-level information from the associated network traffic to understand the adaptation behavior under different network conditions. However, end-to-end traffic encryption protocols such as HTTPS and QUIC are being increasingly used by streaming services, hindering such traditional traffic analysis approaches.