Hi IZ,
SharedView in-session traffic is always encrypted using either of our connection types, either via TCP, or via HTTPS as an automatic fallback (which is a bit slower, but will traverse firewalls). Initial negotiating of the connection may happen over HTTP, but if you're familiar with security and coding, during development we did extensive threat modeling and mitigations as well. Based on this I believe SharedView makes a good corporate information worker solution.
Please let me know if you have additional questions.
thanks
Cameron