If you haven’t noticed, “ephemerality” and “anonymity” are now official buzzwords around consumer software apps — perhaps a not entirely surprising reaction to recent revelations around online privacy and surveillance. So when I heard about a browser that promises to keep sensitive information secure and then vanishes “like a Snapchat” message, I was intrigued. For the past week, I’ve been testing Silo, a browser from a Mountain View, Calif.-based company called Authentic8. This isn’t Authentic8’s first rodeo — the company also makes a similar product for business users — but this is its first consumer-focused application. Silo runs on Macs, PCs and the iPad, and costs $10 per month to use. The idea behind Silo is that it offers a cloud-based, secure browsing session that is running on Authentic8’s servers. It creates shortcuts to dozens of commerce, banking and health websites, and is supposed to make the login process easier and more secure.