Log the IP addresses of anyone visiting Tor website mirrors.
The system does not rely on port numbers (like port 80 for HTTP), which can be easily faked. Instead, it scans packet payloads for structural signatures to identify the protocol, whether it is an encrypted VPN tunnel, a database query, or webmail traffic. 3. Target Fingerprinting
The XKeyscore source code is written primarily in C++ and Java, with a complex architecture that involves multiple components and modules. The code is highly optimized for performance, allowing the program to handle vast amounts of data at incredible speeds.
In 2013, Edward Snowden, a former NSA contractor, leaked classified documents revealing the existence and capabilities of XKeyscore. The leaked documents provided insight into the tool's features and how it was used by the NSA. xkeyscore source code exclusive
The true utility of the platform lies in its ability to take fragmented, unencrypted network packets and seamlessly rebuild them into a human-readable format. TCP Session Reassembly
If you're interested in learning more about XKeyscore or other surveillance tools, I recommend exploring publicly available resources, such as:
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 Log the IP addresses of anyone visiting Tor website mirrors
[ Global Internet Traffic (Fibers/Satellites) ] │ ▼ [ Layer 2/3 Packet Deframer ] │ ▼ [ XKEYSCORE Sensor Node (Deep Packet Inspection) ] ├── Protocol Parsers (HTTP, SMTP, DNS, VPN) ├── Extractor Microservices (Logins, Chats, Files) └── Local Ring Buffers (Temporary RAW Packet Storage) │ ▼ [ Federated Query & Aggregation Tier ] The Sensor Node Tier
Analysts do not need to know a target's IP address. Instead, they deploy "fingerprints"—complex scripts that identify specific behaviors or software configurations. The system matches these rules against all incoming traffic simultaneously.
As XKeyscore is a classified tool, I couldn't find any information on an "exclusive" source code. It's likely that the source code is only accessible to authorized personnel within the NSA and potentially some of its international partners. In 2013, Edward Snowden, a former NSA contractor,
The engine aggregates disparate data points into a cohesive profile. By linking an IP address to a cookie value, an email login, and a web search, it builds a real-time map of an individual's digital footprint. Technical Limitations and Countermeasures
The analysis of the code, conducted by a team of experts, revealed deeply invasive capabilities that went far beyond what the public had been told [5†L6-L13]: