OpenDNS has written an open-source tool to secure the “last mile” in DNS communications. DNSCrypt uses elliptical curve cryptography to encrypt the traffic between the user and DNS. It’s not a replacement for the emerging DNSSEC technology, which digitally signs DNS responses to ensure a website is who it says it is. The tool is available for Macintosh machines only, but it eventually will run on other platforms, CEO David Ulevitch says. “I encourage developers to get involved,” he says.”]