I bet there are thousands of blog posts advocating privacy and explaining why people should resist governments and companies collecting personal data. I dare to write yet another one because I would like to make a couple of points that I have never seen made before. This post will discuss one of these two points: the unknown risk.

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In the previous post, I discussed the use of Yubikey for local encryption. I noted that Yubikey can store a long string that can be used as an encryption key, or a password. It provides no extra protection against key-loggers, but still allows to use strong passwords without remembering and typing them. Today, I would like to discuss a technique that makes Yubikey based encryption more secure; still not resistant to a key-logger, but resistant to having the Yubikey “borrowed” by a thief.

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