Peter Eckersley writes: "EFF has released version 2 of the HTTPS Everywhere browser extension for Firefox, and a beta version for Chrome. The Firefox release has a major new feature called the Decentralized SSL Observatory. This optional setting submits anonymous copies of the HTTPS certificates that your browser sees to our Observatory database allowing us to detect attacks against the web's cryptographic infrastructure. It also allows us to send real-time warnings to users who are affected by cryptographic vulnerabilities or man-in-the-middle attacks. At the moment, the Observatory will send warnings if you connect to a device has a weak private key due to recently discoveredrandom number generator bugs, and we will be adding more such tests in the future." Link to Original Source
I've never been canoeing before, but I imagine there must be just a few
simple heuristics you have to remember...
Yes, don't fall out, and don't hit rocks.