The Commerce Department is considering deploying digital signatures to make DNS less susceptible to hacking, ComputerWorld reports. Under the proposal, DNS records would be signed by DNSSEC (Domain Name and Addressing System Security Extensions). There have been some commitments to the system for the following top-level domains: .gov (US government), .se (Sweden), .br (Brazil), .pr (Puerto Rico), .bg (Bulgaria), as well as the .org TLD. But to make the system really work, ISPs, domain registrars and registries and others would have to upgrade. "DNSSEC signed root zone would represent one of most significant changes to the DNS infrastructure since it was created," according to a notice issued by the U.S. Department of Commerce in the Federal Register, a daily digest...