Read this tip to make your life smarter, better, faster and wiser. LifeTips is the place to go when you need to know about Residential VoIP and other VOIP topics.
In terms of security, think of your Residential VOIP calls like email. You're probably satisfied with firewall software on your home network and don't go the trouble of encrypting your personal email. But you probably also don't use email to transmit your credit card number or other sensitive information. Residential VOIP is as secure as any other application on your network. You should treat it accordingly. Skype does offer encryption services on calls running through its network.