Vpn Encryption - D-Link DFL-1660 User Manual

9.1.2. VPN Encryption

2. Client to LAN connection - Where many remote clients need to connect to an internal
network over the Internet. In this case, the internal network is protected by the NetDefend
Firewall to which the client connects and the VPN tunnel is set up between them.
9.1.2. VPN Encryption
Encryption of VPN traffic is done using the science of cryptography. Cryptography is an umbrella
expression covering 3 techniques and benefits:
Confidentiality
Authentication and Integrity
Non-repudiation
No one but the intended recipients is able to receive and
understand the communication.
accomplished by encryption.
Proof for the recipient that the communication was actually
sent by the expected sender, and that the data has not been
modified in transit. This is accomplished by authentication,
and is often implemented through the use of cryptographic
keyed hashing.
Proof that the sender actually sent the data; the sender cannot
later deny having sent it. Non-repudiation is usually a
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Chapter 9. VPN
Confidentiality is