Xkeyscore Source Code Exclusive 'link' Jun 2026

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"

At the edge of the network, high-speed fiber-optic taps clone raw data packets directly from internet backbone infrastructure. The source code indicates the heavy use of customized packet capture drivers (PF_RING and modified network interface cards) capable of zero-copy memory operations to prevent packet drops at 10Gbps and 100Gbps line rates.

Specific cookie values assigned by advertising networks (e.g., Google's PREF cookie), which allow tracking individuals across different networks even if they use a VPN. The Query Logic: How Analysts Search the Web

Traditional wiretaps require a hard selector, such as a specific phone number or email address. XKEYSCORE’s source code proves the system relies heavily on "soft selectors." These are behavioral patterns rather than specific identities. Examples include:

In 2013, the world learned the name XKeyscore. Edward Snowden leaked slides detailing the National Security Agency’s (NSA) most expansive internet surveillance system. The intelligence community scrambled, and the public was outraged. But for years, the actual mechanics of the software remained a black box.

The "fingerprinting" techniques, if leaked, could be used by private companies or hackers for unauthorized tracking.