How to change key size in OpenSSH? I would like to change it from 1024 key size length to 512.
I am pretty sure this is what you are after. You need to use ssh-keygen.
ssh-keygen -t rsa -b 512
this should create a 512 rsa crypto key
There's also a ServerKeyBits option in sshd_config, can set that to a minimum of 512.
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5 years ago