How secure is TightVNC?
Although TightVNC encrypts VNC passwords sent over the net, the rest of the traffic is sent as is, unencrypted (for password encryption, VNC uses a DES-encrypted challenge-response scheme, where the password is limited by 8 characters, and the effective DES key length is 56 bits). So using TightVNC over the Internet can be a security risk. To solve this problem, we plan to work on built-in encryption in future versions of TightVNC. In the mean time, if you need real security, we recommend installing OpenSSH, and using SSH tunneling for all TightVNC connections from untrusted networks.
