Classification Of Network Security Services; Implementation Of Network Security Services - H3C SecPath F1800-A Operation Manual

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H3C SecPath F1800-A Firewall

1.1.2 Classification of Network Security Services

Network security services are a set of security measures taken against the above
security threats. They are shown in
Table 1-2 Network security services
Availability service
Confidentiality service
Integrality service
Verification
Authorization

1.1.3 Implementation of Network Security Services

I. Encryption
It is a process to translate a readable message into an unreadable encrypted text.
It can:
Provide users with communication security;
Become the basis of many security mechanisms.
For example, password mechanism includes:
Authentication password design
Security communication protocol design
Digital signature design
Encryption methods are of three types. They are shown in
Table 1-3 Encryption methods
Symmetric
mechanism
Type
Ensures information or services can be accessed if
required.
Ensures that sensitive data or information is not
disclosed or exposed to an unauthorized entity.
Ensures that data cannot be modified or destroyed in
an unauthorized mode.
Ensures the legality of an entity ID.
Specifies the access authority for a user to control
resources.
Type
Its
encryption and decryption
password is identical. One pair of
users share one password
to exchange message,
and keys must be private.
Table 1-2.
Description
Description
security key of
1-2
Chapter 1 Firewall Overview
Table 1-3.
Remark
It includes:
Data Encryption
Standard (DES)
Triple DES (3DES)