The Department of Homeland Security (DHS) Science and Technology (S&T) Homeland Security Advanced Research Projects Agency (HSARPA) Cyber Security Division's (CSD) announce a Broad Agency Announcement (BAA) for Fiscal Year 2011 to improve the security in both Federal networks and the larger Internet. This Broad Agency Announcement (BAA) seeks ideas and proposals for Research and Development (R&D) in 14 Technical Topic Areas (TTAs) related to CSD. The total estimated value of this acquisition is $40 million. Cyber attacks are increasing in frequency and impact. Even though these attacks have not yet had a significant impact on our Nation's critical infrastructures, they have demonstrated that extensive vulnerabilities exist in information systems and networks, with the potential for serious damage. The effects of a successful cyber attack might include: serious consequences for major economic and industrial sectors, threats to infrastructure elements such as electric power, and disruption of the response and communications capabilities of first responders. The DHS S&T mission is to conduct, for homeland security purposes, research, development, test and evaluation (RDT&E) and timely transition of cyber security capabilities to operational units within DHS, as well as local, state, Federal and operational end users in critical infrastructure. Cyber security is defined in broad terms to encompass the usual attributes of security, as well as reliability, availability, and survivability in the face of adversary attack and accidental fault, while preserving privacy. DHS S&T invests in programs offering the potential for revolutionary changes in technologies that promote homeland security and accelerate the prototyping and system prototype demonstration in an operational environment of technologies that reduce homeland vulnerabilities. A critical area of focus for DHS is the development and deployment of technologies to protect the nation's cyber infrastructure, including the Internet and other critical infrastructures that depend on computer systems for their mission.