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iancoleman / bip39

A web tool for converting BIP39 mnemonic codes
https://iancoleman.io/bip39/
MIT License
3.43k stars 1.42k forks source link

Question #440

Closed maltokyo closed 3 years ago

maltokyo commented 3 years ago

On any mac or linux system, I use this to generate 256bit binary string. Any thoughts or comments on whether this is secure enough as the entropy input (using in offline computer) for this tool?

head -100000000 /dev/urandom | LC_ALL=C tr -dc '0-1' | head -c 256

iancoleman commented 3 years ago

Sounds fine but I am no expert in secure random so this is just my opinion and it may not be appropriate for your needs. /dev/urandom depends on certain factors like how much entropy has been gathered by the operating system. eg fresh start of a live distro may not have much entropy.