Security Approaches | Network Security | Cryptography and Network Security
Security Approaches | Network Security | Cryptography and Network Security
Security Approaches
To guarantee the security of networks and data, many elements in the field of network security work together.
1. AUTHENTICATION The assurance that the communicating entity is the one that it claims to be.
a. Peer Entity Authentication Used in association with a logical connection to provide confidence in the identity of the entities connected.
b. Data-Origin Authentication In a connectionless transfer, provides assurance that the source of received data is as claimed.
2. ACCESS CONTROL The prevention of unauthorized use of a resource (i.e., this service controls who can have access to a resource, under what conditions access can occur, and what those accessing the resource are allowed to do).
3. DATA CONFIDENTIALITY The protection of data from unauthorized disclosure.
a. Connection Confidentiality The protection of all user data on a connection.
b. Connectionless Confidentiality The protection of all user data in a single data block
c. Selective-Field Confidentiality The confidentiality of selected fields within the user data on a connection or in a single data block.
d. Traffic-Flow Confidentiality The protection of the information that might be derived from observation of traffic flows.
4. DATA INTEGRITY The assurance that data received are exactly as sent by an authorized entity (i.e., contain no modification, insertion, deletion, or replay).
a. Connection Integrity with Recovery Provides for the integrity of all user data on a connection and detects any modification, insertion, deletion, or replay of any data within an entire data sequence, with recovery attempted.
b. Connection Integrity without Recovery As above, but provides only detection without recovery.
c. Selective-Field Connection Integrity Provides for the integrity of selected fields within the user data of a data block transferred over a connection and takes the form of determination of whether the selected fields have been modified, inserted, deleted, or replayed.
d. Connectionless Integrity Provides for the integrity of a single connectionless data block and may take the form of detection of data modification. Additionally, a limited form of replay detection may be provided.
e. Selective-Field Connectionless Integrity Provides for the integrity of selected fields within a single connectionless data block; takes the form of determination of whether the selected fields have been modified.
5. NONREPUDIATION Provides protection against denial by one of the entities involved in a communication of having participated in all or part of the communication.
a. Nonrepudiation, Origin Proof that the message was sent by the specified party.
Nonrepudiation, Destination Proof that the message was received by the specified party.
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