('-.   ('-.     _  .-')       .-') _  _   .-')                _  .-')     ('-.   
        _(  OO) ( OO ).-.( \( -O )     ( OO ) )( '.( OO )_             ( \( -O )  _(  OO)  
 ,--.     (,------./ . --. / ,------. ,--./ ,--,'  ,--.   ,--.).-'),-----. ,------. (,------. 
 |  |.-')  |  .---'| \-.  \  |   /`. '|   \ |  |\  |   `.'   |( OO'  .-.  '|   /`. ' |  .---' 
 |  | OO ) |  |  .-'-'  |  | |  /  | ||    \|  | ) |         |/   |  | |  ||  /  | | |  |     
 |  |`-' |(|  '--.\| |_.'  | |  |_.' ||  .     |/  |  |'.'|  |\_) |  |\|  ||  |_.' |(|  '--.  
(|  '---.' |  .--' |  .-.  | |  .  '.'|  |\    |   |  |   |  |  \ |  | |  ||  .  '.' |  .--'  
 |      |  |  `---.|  | |  | |  |\  \ |  | \   |   |  |   |  |   `'  '-'  '|  |\  \  |  `---. 
 `------'  `------'`--' `--' `--' '--'`--'  `--'   `--'   `--'     `-----' `--' '--' `------' 

    

XKEYSCORE Slide Presentations:

NSA XKEYSCORE slides - XKS, Cipher Detection, and You! XKS, Cipher Detection, and You! Aug 21, 2008 (17 slides)
NSA XKEYSCORE slides - HTTP activity HTTP Activity in XKEYSCORE - March, 2009 (21 slides)
NSA XKEYSCORE slides - Search Forms XKEYSCORE Search Forms - March, 2009 (49 slides)
NSA XKEYSCORE slides - Finding and Querying Document Metadata Finding and Querying Document Metadata - April, 2009 (24 slides)
NSA XKEYSCORE slides - Analyzing Mobile Cellular DNI Analyzing Mobile Cellular DNI in XKS - May, 2009 (17 slides)
NSA XKEYSCORE slides - HTTP Activity vs User Activity HTTP Activity vs User Activity - June 19, 2009 (36 slides)
NSA XKEYSCORE slides - Email Address vs User Activity Email Address vs User Activity - June 24, 2009 (20 slides)
NSA XKEYSCORE slides - Using XKS to Enable TAO Using XKS to Enable TAO - July 16, 2009 (47 slides)
NSA XKEYSCORE slides - Web Forum Exploitation Using XKS Web Forum Exploitation Using XKS- July, 2009 (7 slides)
NSA XKEYSCORE slides - Free file uploaders Free File Uploaders (FFU) - Aug 13, 2009 (33 slides)
NSA XKEYSCORE slides - Intro to XKS AppIDs and Fingerprints Intro to XKS AppIDs and Fingerprints - Aug 27, 2009 (60 slides)
NSA XKEYSCORE slides - Tracking Targets on Online Social Networks Tracking Targets on Online Social Networks - Sept, 2009 (21 slides)
NSA XKEYSCORE slides - Intro to Context Sensitive Scanning With XKS Fingerprints Intro to Context Sensitive Scanning With XKS Fingerprints - May, 2010 (61 slides)
NSA XKEYSCORE slides - Writing XKS Fingerprints Writing XKS Fingerprints - Nov, 2010 (67 slides)

XKEYSCORE User Guide and Documentation:

NSA XKEYSCORE user guide and XKEYSCORE fingerprints documentation
The Unofficial XKEYSCORE User Guide (27 pages)
Guide to Using Contexts in XKS Fingerprints (24 pages)
How to Configure Category Throttling in XKEYSCORE (2 pages)
Using XKS to find and search for logos embedded in documents (2 pages)