Zfone offers a VoIP security and encryption solution in an industry that has thus far been slow to offer one. Working with any standard SIP, Zfone offers encryption services for callers and callees running the software. The fact that Zfone's creator is Phil Zimmermann, the creator of email security application PGP is reason enough for VARs and systems integrators to look into this technology in their campaign to sell VoIP to their customers.
Secure VoIP with Zfone
What makes Zfone special? Basically, it delivers public key encryption without requiring support from a public key infrastructure (PKI). Those already familiar with PGP will grasp the nuances involved, but it suffices to say that Zfone uses what Zimmermann calls "ephemeral Diffie-Hellman with hash commitment" and uses a set of keys only for the duration of a single call, so that subsequent replay attacks are impossible.
Although enterprises and large organizations may often be loath to adopt client-based solutions such as this, Zimmermann's long and compelling security track record is such that even these kinds of users should be willing to put Zfone to the test.
Learn more about securing VoIP with Zfone.
About the author
Ed Tittel is a regular contributor to numerous TechTarget Web sites. He is the author of more than 140 books on a wide range of computing subjects, from markup languages to information security. He is also Technology Editor for Certification Magazine, and he manages content for NetPerformance.com. Email Ed at firstname.lastname@example.org.
This was first published in April 2007