The leaked material primarily consists of and fingerprints used to identify and categorize internet traffic. Notable findings from the analysis include:
I pulled the USB drive. The screen went black for a second, reflecting my own face back at me. I wondered, idly, if my IP address had just been flagged.
XKeyscore is the NSA’s widest-reaching system for intercepting and analyzing global internet data. Operating under the umbrella of signals intelligence (SIGINT), it processes the vast ocean of information flowing through undersea fiber-optic cables, internet service providers (ISPs), and major telecommunications routing hubs.
XKeyscore Source Code Exclusive: Analyzing the Anatomy of Global Surveillance xkeyscore source code exclusive
Once packets are captured, they are fed into processing engines running specialized software routines. The code utilizes a highly sophisticated deep packet inspection (DPI) engine. This layer parses raw network protocols (TCP, UDP, HTTP, SMTP) and extracts "selectors"—unique identifiers such as email addresses, phone numbers, usernames, and IP addresses. The Storage and Query Layer (The Local Buffer)
The ease with which XKeyscore parsed unencrypted HTTP traffic forced the technology industry to transition rapidly to HTTPS by default. Protocols like TLS 1.3 and Perfect Forward Secrecy (PFS) were widely adopted specifically to break the passive interception capabilities utilized by XKeyscore.
According to the configuration file ( config/xs_global.conf ), the system retains "FULL DATA" for 3 days, "SURFACE DATA" (metadata + payload previews) for 30 days, and "META ONLY" for 365 days. However, a commented line in the code ( // 5-eyes no deletion policy ) suggests that data marked as "Permanent Hold" never actually purges. The leaked material primarily consists of and fingerprints
// Conceptual logical flow found within XKeyscore extraction rules if (app_protocol == "http" or app_protocol == "https") if (http_host matches "bridges.torproject.org" or http_request_url contains "tor/status-vote") tag_traffic("ANONYMITY_USER_TOR"); extract_identity_metadata();
Before the leaks, the vast majority of web traffic traveled unencrypted via standard HTTP. The revelation that the NSA was actively parsing this data forced the tech industry's hand. Tech giants like Google, Yahoo, and Microsoft rapidly moved to encrypt their internal data centers. Today, standard HTTPS encryption, end-to-end encrypted messaging apps (like Signal and WhatsApp), and encrypted DNS routing have become the global baseline, explicitly designed to break the passive collection capabilities that XKeyscore relied upon.
Should we focus on (like VPN/handshake detection)? I wondered, idly, if my IP address had just been flagged
The Blueprint of Global Surveillance: Inside the XKeyscore Source Code Exclusive
While the full underlying engine remains secret, the leaked configuration files and user guides provide a look at its functionality: