Digital Signature Guidelines Tutorial
Discusses the legal implications of digital signature usage. (American Bar Association)

Electronic Commerce and Internet Law Resource Center
A library of information regarding the legal issues surrounding cyberspace. (Perkins Coie llp)

PKI Law
A PKI information exchange emphasizing emerging legal issues, to hasten the implementation of Public Key Infrastructure throughout the world

Digital Signature Resource Center
A collection of links to digital signature related laws, policy development, e-commerce, and cryptography resources. (Internet Law and Policy Forum)