For example, the IP Security protocol, which doesn't work well through NAT devices, will work fine with 6to4, proponents say.

CNN: New protocol sneaks IPv6 traffic over the 'Net

In parallel, define a security architecture and migration strategy that provides security through browsers, Secure Sockets Layer and passwords in the short run, and gets you started on PKI by deploying technologies such as IP Security virtual private networks and the Secure Multi-purpose Internet Mail Extensions e-mail standard.

CNN: Easy-to-use PKI is key to cryptography's success

For their part, IP service providers say the security risks are overblown, but legitimate.

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