Xkeyscore Source Code Exclusive ((free))

The leaked source code—primarily written in C++, Python, and specialized configuration languages—revealed that XKeyscore relies on a highly modular, plugin-based architecture. Instead of manually reading data packets, the system uses automated "extractors" to parse raw network traffic on the fly. Deep Packet Inspection (DPI)

If an analyst flags specific intercepted data as relevant to an investigation, that data is transferred to a permanent archive (like the MARINA or PINWALE databases), where it can be stored indefinitely. 3. Minimal Oversight and the "Foreigner" Loophole

Standard network monitoring captures metadata. XKEYSCORE, according to the source, goes further. A module named session_resurrect.c contains functions that rebuild ephemeral encrypted sessions from fragmented packets—even when TLS 1.3 handshakes are incomplete.

The scripts demonstrate the ability to log users who visit privacy-centric forums, categorizing them by the language used on the site to narrow down geographic locations. 3. Selector Targeting and "Soft Selectors" xkeyscore source code exclusive

Raw data (full packet captures) is stored in a rolling buffer that overwrites itself every 3 to 5 days.

According to the newly examined source code, XKEYSCORE is composed of three primary tiers:

Front-end servers intercept raw fiber-optic traffic, reassembling fragmented TCP packets on the fly. The leaked source code—primarily written in C++, Python,

The code relies heavily on "selectors"—unique identifiers belonging to a target. However, the source code reveals that XKeyscore doesn't just track known terrorists; it targets the structural mechanics of anonymity itself. Targeting Tor and Privacy Infrastructure

[ Internet Backbone Traffic ] │ ▼ ┌───────────────────────────────┐ │ Deep Packet Inspection │ (Protocol parsing & metadata extraction) └──────────────┬────────────────┘ │ ▼ ┌───────────────────────────────┐ │ Local Buffer Storage │ (Rolling storage: 3-5 days content, 30 days metadata) └──────────────┬────────────────┘ │ ▼ ┌───────────────────────────────┐ │ Federated Query Interface │ (Centralized analyst access via MySQL/NoSQL) └───────────────────────────────┘ Rolling Buffers and Storage Constraints

The code features an extensive library of "AppIDs" (Application Identifiers). These are regex (regular expression) patterns and behavioral signatures used to identify specific software applications. When a user logs into a specific webmail provider, uses a virtual private network (VPN), or downloads a specific file type, XKeyscore matches the packet characteristics against these AppID rules to classify the traffic instantly. The Tor and Privacy Infrastructure Targeting A module named session_resurrect

The architecture includes specific plugins tailored for every major internet service. The leaked configuration files showed extractors dedicated to tracking:

The override was the rule, not the exception.