Internal MESA Lab reading notes dissect the USENIX 2024 paper on fingerprinting obfuscated proxies via encapsulated TLS handshakes, highlighting its protocol-agnostic packet-size-3-gram-plus-Mahalanobis-distance-over-bursts classifier, which the paper's own mid-size-ISP deployment reliably fingerprinted across shadowsocks, vmess, trojan, and vless-family configurations at false-positive rates the notes explicitly say the annotator estimates the GFW would find operationally acceptable (<0.6%). The notes flag the technique's main gaps as: no public source code, sharply reduced true-positive rate under connection multiplexing (10-30% vs. 60-80% unmultiplexed), and no evaluation against UDP/QUIC.

A 2020 MESA Lab monthly report describes building a sapp plugin that extracts packet-sequence features specifically "for DoH (DNS-over-HTTPS) service discovery," alongside a broader CSTNET DoH measurement-report effort and configuring a DNS-to-DoH gateway -- confirming sapp is used to fingerprint DoH traffic via statistical sequence features rather than plaintext DNS content.

An internal MESA Lab research survey dedicated to Snowflake reviews five external papers on fingerprinting/blocking Snowflake and WebRTC-based transports, including a 2023 CSCWD paper that fingerprints Snowflake's broker-contact requests (disguised as HTTPS) via packet size, direction, timing, and network speed to distinguish them from ordinary web requests, and a 2020 paper claiming 100% identification of Snowflake DTLS handshakes against Facebook Messenger/Hangouts/ Discord WebRTC traffic in a closed-world test — annotated throughout with the MESA reviewer's own critical commentary on each method's weaknesses (e.g. sensitivity to user geography/network, only tested at host/LAN vantage points rather than backbone).

A June 2024 internal MESA Team survey ('针对审查系统的科学研究及探测技术调研报告') catalogs the academic censorship-measurement toolkit (OONI, Augur, Satellite, Quack/Hyperquack, GFWatch, GFWeb, middlebox weaponization studies, traceroute-based middlebox localization, device fingerprinting) and separately reviews circumvention-tool countermeasures, explicitly naming Lantern alongside Psiphon, Tor Meek and Signal as tools using uTLS-style TLS ClientHello mimicry and domain-fronting.

The same internal research note's second research point develops an ML-based detector for Geneva-style automated censorship-evasion traffic; simple flow-level features (flow size, max packet size, RST/SYN/FIN flag counts, forward init-window bytes, inter-arrival timing) achieve near-perfect (ROC-AUC ~1.00) classification of Geneva-generated evasion traffic against CICIDS2017 and MAWI backbone background traffic using decision trees, LightGBM, XGBoost and random forest, with abnormal flow size (~150 bytes vs. 1000-30000 bytes typical) identified as the single most discriminative feature.

A dedicated internal "运营商前端分析团队" (Carrier Front-end Analysis Team) produces weekly, carrier-specific traffic-analysis reports explicitly titled "新疆移动流量分析报告" (Xinjiang Mobile Traffic Analysis Report) and "新疆联通流量分析报告" (Xinjiang Unicom Traffic Analysis Report), with instances dated from at least July 2022 through March 2024. One instance (Xinjiang Mobile, 2023-05-15) reports total carrier bandwidth of 4.4Tbps (1Tbps access bandwidth), 27.34PB of weekly throughput, 123 distinct identified application-layer protocols, and a section (4.1, pages 17+) explicitly tracking server IP/location for 28 named overseas apps (BBC, Discord, ESPN, Facebook, Gmail, Google, Hulu, Instagram, Netflix, Reddit, Skype, Telegram, Twitter, Uber, WhatsApp, Wikipedia, YouTube, Zoom, etc.).

MESA Lab researcher notes on an encrypted-video-identification project describe adding SSL-layer information output to more precisely trace a flow's true source/identity, and considering reinforcement learning so the identification model adapts as network conditions change, working within/around sapp's plugin limitations.