Get the Whitepaper called Flash Cookies And Privacy II: Now With HTML5 And ETag Respawning. This is a follow-up study that reassesses the flash cookie landscape and examines a new tracking vector, HTML5 local storage, and cache-cookies via ETags.
You can download it from the following link: https://packetstormsecurity.com/files/download/104052/SSRN-id1898390.pdf
Source: https://packetstormsecurity.com/files/104052/Flash-Cookies-And-Privacy-II-Now-With-HTML5-And-ETag-Respawning.html