Start
PuTTYgen
Select SSH-2 RSA
and set the Number of bits in a generated key to: 4096
Press the Generate
button:
Move your mouse continuously over the blank area until the keys have finished generating:
Enter and confirm the pass phrase
you want to use to protect the private key:
Press the Save private key
button and save it somewhere safe:
Press the Save public key
button and save it somewhere safe:
Select and copy the "Public key for pasting into OpenSSH Authorized_keys file
", this is the key that you give to others to give you access to services: