Legalarchiver.org: SAFE Act - Complete text of the United States "Security and Freedom Through Encryption (SAFE) Act", which relaxed export controls on encryption and prohibited mandatory key escrow. - http://www.legalarchiver.org/safe.htm
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) - http://www.ilpf.org/groups/index.htm#authentication
PKI Law - A PKI information exchange emphasizing emerging legal issues, to hasten the implementation of Public Key Infrastructure throughout the world - http://www.pkilaw.com/
Digital Signature Guidelines Tutorial - Discusses the legal implications of digital signature usage. (American Bar Association) - http://www.abanet.org/scitech/ec/isc/dsg-tutorial.html