On Aug 24, 2:13*am, Bin Chen wrote:

> SSH can use public-private key encryption to secure the connection,
> take Diffie-Hellman algorithm as example(RSA is too complicated), the
> purpose of public key and private key is to generate a "same key" used
> for both side to do symmetric encryption, but the "same key" is not
> transferred on the wire so it can't be sniffered.

> My question is , does SSHD use many public keys for one machine(One
> user one public key)?, or just a common public key for all the users?

Normally, SSHD uses a single public key for the machine.

DS