Let’s Encrypt is a free, automated, and open certificate authority (CA), run for the public’s benefit. Let’s Encrypt is a service provided by the Internet Security Research Group (ISRG).
The service is due to launch in summer 2015, but unless all browser vendors choose to include it as a trusted CA, it will be dead in the water. So far, I haven’t been able to find out if such an agreement has been made. Maybe they are using IdenTrust as a cross-signing partner.
New research by the EFF suggesting that most browsers create a unique signature that can be used as a means of identification.
The findings were the result of an experiment EFF conducted with volunteers who visited http://panopticlick.eff.org … EFF found that 84% of the configuration combinations were unique and identifiable, creating unique and identifiable browser “fingerprints”. Browsers with Adobe Flash or Java plug-ins installed were 94% unique and trackable.