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I am trying to create a cold wallet using SBC such as raspberry pi (not raspberry pi).
I wonder if the random generator is secure enough to generate random wallet address, for both BTC and ETH.
I heard there were fatal flaw in Android random number generator before. Is it possible that SBC can have the same issue?
The TRNG in every modern rPi is indeed quality high entropy
/dev/hwrng "seeds" (feed extra entropy to) the /dev/urandom device
Take a look in the /var/log/syslog file
need rng-tools.service running
apt policy rng-tools
Also check haveged is in the kernel.
Good overview here
https://hackaday.com/2017/11/02/what-is-entropy-and-how-do-i-get-more-of-it
Also check out Easyseed https://github.com/nym-zone/easyseed
Use an rPi with no networking hardware, ideally wipe it securely between sessions.
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