Re: [PATCH v4 0/5] /dev/random - a new approach

Am Samstag, 18. Juni 2016, 10:44:08 schrieb Theodore Ts'o:

Hi Theodore,

At the end of the day, with these devices you really badly need a
hardware RNG.  We can't generate randomness out of thin air.  The only
thing you really can do requires user space help, which is to generate
keys lazily, or as late as possible, so you can gather as much entropy
as you can --- and to feed in measurements from the WiFi (RSSI
measurements, MAC addresses seen, etc.)  This won't help much if you
have an FBI van parked outside your house trying to carry out a
TEMPEST attack, but hopefully it provides some protection against a
remote attacker who isn't try to carry out an on-premises attack.

All my measurements on such small systems like MIPS or smaller/older ARMs do 
not seem to support that statement :-)

Ciao
Stephan