An amended first cut at a list of Federal cybersecurity initiatives. I intentionally left ousome of the purely ornamental functions (White House CTOs CIOs, NSTIC, etc.) or Departmental initiatives. There are some recurring themes (military operations, critical infrastructure protection), a lot of organizational and governance efforts, and a few dead spots. Rough count: Clinton: 4; Bush: 6; Obama: 17. We'll continue to refine this.
Timeline: Federal Cybersecurity Efforts
Clinton
1998 PDD63 - critical infrastructure (http://goo.gl/omfH05)
Creation of CIAO/NIPC
Federal Computer Incident Response Center (http://goo.gl/481aiA)
1999 Encryption decontrol (https://goo.gl/aEb9iM)
Bush
2002 NSPD 16 - offensive cyber operations
2003 DHS (https://goo.gl/sJNZ3P)
US-CERT (https://goo.gl/Gly3M0)
HSPD-7 - critical infrastructure (http://goo.gl/DZyl84)
2004 NSPD 38 National strategy (https://goo.gl/OX7L7V)
2008 NSPD 54 Cybersecurity policy (CNCI) (http://goo.gl/7T7nYN)
Obama
2009 60 Day review (https://goo.gl/b5vK7Y)
White House coordinator (https://goo.gl/cmbr9N)
DHS Deputy Undersecretary for cyber (https://goo.gl/63ihOH)
NCCIC (https://goo.gl/KEQ8tb)
Cyber Command (http://goo.gl/XnRylS)
2010 National Cyber Incident Response Plan (http://goo.gl/PL53dG)
2011 International Strategy (https://goo.gl/vauxL1)
Coordinator for International Cyber Issues (http://goo.gl/K075wE)
DOD Strategy (http://goo.gl/8xIK3W)
2012 PPD 20 (military cyber operations)
2013 EO 13636 - critical infrastructure (https://goo.gl/A2ePX2)
2014 NIST Framework (http://goo.gl/83loue)
2015 EO Information Sharing (https://goo.gl/saV4WM)
EO Cyber Sanction (https://goo.gl/bLUsOX)
DOD Cyber strategy update (http://goo.gl/v8ld6p)
Creation of CTIIC (https://goo.gl/XM5HKm)
2016 EO CNAP (https://goo.gl/EHfGUq)
Congress
2002 Homeland Security Act (https://goo.gl/xOJp8b)
Federal Information Security Management Act (FISMA) (http://goo.gl/B4VH2Z)
2014 Federal Information Security Modernization Act (https://goo.gl/eG4nuc)
2015 Cybersecurity Information Sharing Act (http://goo.gl/C9G3Dr)