Just a little bit curious, why PuTTY use its own version of private key format to do SSH?
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Just a little bit curious, why PuTTY use its own version of private key format to do SSH?
The author of PuTTY gives two main reasons for having the custom key format on this page.
In short:
PuTTY’s format stores the public half of the key in plaintext, which allows PuTTY to send the public key to the server automatically.
The key is fully tamperproofed with the help of a Message Authentication Code.