AirLive RS-3000 - Manual (Page 269)

supports two encryption modes: Transport and Tunnel. Transport mode encrypts only the data of
each packet, but leaves the header untouched. The more secure Tunnel mode encrypts both the
header and the payload. On the receiving side, an IPSec-compliant device decrypts each packet.
PPTP
Point-to-Point Tunneling Protocol: A VPN protocol developed by PPTP Forum. With PPTP, users
can dial in to their corporate network via the Internet. If users require data encryption when using the
Windows PPTP client, the remote VPN server must support MPPE (Microsoft Point-To-Point Encryption
Protocol) encryption. PPTP is also used by some ISP for user authentication, particularly when
pairing with legacy Alcatel / Thomson ADSL modem.
Preshare Key
The IKE VPN must be defined with a Preshared Key. The Key may be up to 128 bytes long.
ISAKMP (Internet Security Association Key Management Protocol)
An extensible protocol-encoding scheme that complies to the Internet Key Exchange (IKE) framework
for establishment of Security Associations (SAs).
AH (Authentication Header)
One of the IPSec standards that allows for data integrity of data packets.
ESP (Encapsulating Security Payload)
One of the IPSec standards that provides for the confidentiality of data packets.
DES (Data Encryption Standard)
The Data Encryption Standard developed by IBM in 1977 is a 64-bit block encryption block cipher using
a 56-bit key.
Triple-DES (3DES)
The DES function performed three times with either two or three cryptographic keys.
AES (Advanced Encryption Standard)
An encryption algorithm yet to be decided that will be used to replace the aging DES encryption
algorithm and that the NIST hopes will last for the next 20 to 30 years.
NULL Algorithm
It is a fast and convenient connecting mode to make sure its privacy and authentication without
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