Critical infrastructure protection (CIP) enhances the security of the nation's cyber and physical public and private infrastructure. Federal agencies and other public and private entities rely extensively on computerized systems and electronic data to support their missions. CIP issues involve developing a national CIP strategy, improving analysis and warning capabilities, improving information sharing on threats and vulnerabilities, and addressing pervasive weaknesses in federal information security. Although the national strategy for homeland security acknowledges the need to address these challenges, much work remains to successfully implement it.