Multi-Tenant Public Clouds: Security Risk or FUD?

Does multi-tenancy make public clouds an inherent security risk? Cloud provider Rackspace says that’s just a bunch of FUD:

In an interview with eSecurity Planet at the Interop networking conference last week, Engates emphasized that at all modern networking is multi-tenant at some level: When you think about it, we all share the same basic switching and networking infrastructure.

“The Internet is a big multi-tenant network,” Engates said. “We’re doing multi-tenancy all over the place — [yet] people embrace it in one place and then on the other hand they downplay it like it’s the worst thing. At this point, I think it’s more about lack of awareness — and Fear, Uncertainty, and Doubt.”