Same and /second. I'd add that I've trouble encrypting emails with attachments, as Javascript encryption performance in web-based email in a browser that's bei

Same and /second. I'd add that I've trouble encrypting emails with attachments, as Javascript encryption performance in web-based email in a browser that's being abused with lots of other tabs open is not always so reliable. Surprise surprise. The Stanford Javascript Crypto Library whitepaper provides probably the best performance baseline for all of Javascript crypto [1], and the best they can do is roughly 10x faster than the next fastest JS crypto implementation, but still over 40x slower than native crypto. [1]:http://crypto.stanford.edu/sjcl/ http://crypto.stanford.edu/sjcl/