FROST: Fingerprinting Remotely using OPFS-based SSD Timing [pdf] (hannesweissteiner.com)

11 points by simjnd 3 hours ago

3 comments:

by Bender 2 hours ago

I see they are testing this on a Mac. I am curious what the test results look like if the users home directory or even the dot directories are tmpfs. On Linux .bash_login can repopulate dot directories from a archive directory think skeleton files and the dot directories can be ephemeral mounted as tmpfs. The person can have a command to commit their ephemeral directories back to the archive if they want to "keep their changes" so to speak. Or automate it on .bash_logout.

    du --max-depth 0 -h -c .cache .config .local
    767M    .cache
    278M    .config
    2.2M    .local
    1.1G    total
It's a bit of space on this CachyOS laptop but it's doable.
by Dwedit 23 minutes ago

Saw "OPFS" and immediately misread it as OSPF (open-shortest-path-first)

by vivzkestrel an hour ago

a bit off topic but on the topic of fingerprinting here, anyone knows how reddit fingerprinting works at a rough level?

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