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Glossary
3DES
Triple Data Encryption Standard, or
Triple DES. An encryption standard used
to encode data while it travels on a net-
work. 3DES uses 168-bit keys to encrypt
data.
3DES is available only in the domestic
version of Packet Protect.
AH
Authentication Header. A protocol of veri-
fying the integrity of packets, that is, the
packets are known to be from the originat-
ing computer. Packet Protect uses MD5
and SHA-1 to authenticate packets.
anti-replay
Protection against receiving repeat data
transmitted on the network. This helps
prevent an intruder from successfully
sending the same data in an attempt to
confuse the system (for example, the com-
puter could repeat the task of restarting a
server).
authentication
The process of verifying the identity of a
computer. Packet Protect authenticates a
computer using pre-shared keys. It helps
verify that a computer is who it claims to
be.
cryptography
The science of protecting the privacy of
data by encoding the data so it is unread-
able to anyone who doesn’t have a secret
key to decode it.
CPU utilization
A measurement of the average load on a
computer’s processor. As processor usage
increases due to security tasks, users may
notice slower performance. Intel
PRO/100 S Management and Server
Adapters are designed to offload the secu-
rity overhead from Packet Protect by using
a special on-board processor, thereby
reducing processor utilization.
decryption
The un-encoding of encrypted data using a
secret password or key.
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