Feeds

Über-zombie cookies give us the fear

Say hello to invulnerable evercookies

5 things you didn’t know about cloud backup

Privacy activists got hot under the collar about the use of flash cookies to respawn traditional website cookies* but an even more persistent type of cookie that's almost impossible to kill off may lie just around the corner.

So-called in invulnerable evercookies use eight different techniques and locations to hide on tagged systems, including web history, HTML5 session storage and even the "RGB values of auto-generated, force-cached PNGs using HTML5 Canvas tag to read pixels (cookies) back out" as well as in flash or regular cookies. Providing just one copy of the cookie remains, the other locations are rebuilt.

The concept echoes Lord Voldemort hiding fragments of his soul in horcruxes in the Harry Potter books.

Developer Samy Kamkar explains the point of his idea: "Evercookie is designed to make persistent data just that, persistent. By storing the same data in several locations that a client can access, if any of the data is ever lost (for example, by clearing cookies), the data can be recovered and then reset and reused.

"Simply think of it as cookies that just won't go away."

Kamkar reckons using Private Browsing in Safari will stop ALL evercookie methods following a browser restart. He hasn't tested whether this approach work with other browsers. ®

* A Walt Disney internet subsidiary faces a civil lawsuit over its alleged use of Flash cookies to track users, including minors, as we reported here.

Secure remote control for conventional and virtual desktops

More from The Register

next story
Ice cream headache as black hat hacks sack Dairy Queen
I scream, you scream, we all scream 'DATA BREACH'!
Goog says patch⁵⁰ your Chrome
64-bit browser loads cat vids FIFTEEN PERCENT faster!
NIST to sysadmins: clean up your SSH mess
Too many keys, too badly managed
Scratched PC-dispatch patch patched, hatched in batch rematch
Windows security update fixed after triggering blue screens (and screams) of death
Researchers camouflage haxxor traps with fake application traffic
Honeypots sweetened to resemble actual workloads, complete with 'secure' logins
Attack flogged through shiny-clicky social media buttons
66,000 users popped by malicious Flash fudging add-on
New Snowden leak: How NSA shared 850-billion-plus metadata records
'Federated search' spaffed info all over Five Eyes chums
Three quarters of South Korea popped in online gaming raids
Records used to plunder game items, sold off to low lifes
Oz fed police in PDF redaction SNAFU
Give us your metadata, we'll publish your data
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Advanced data protection for your virtualized environments
Find a natural fit for optimizing protection for the often resource-constrained data protection process found in virtual environments.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.