List out various types of attacks and explain in brief.
1) Passive attack : A passive attack attempts to learn use of information from the system but does not affect system resources.
Relatively hard to detect, but easier to prevent.
A) Release of message contents
A telephone conversation, an electronic mail message, and a transferred file may contain sensitive or confidential information.
We would like to prevent an opponent from learning the contents of these transmissions.
Attack on confidentiality.
studying the flow of "traffic" to find patterns of behaviour.
2) Active attack : An active attack attempts to alter system resources or affect their operation.
Relatively hard to prevent, but easier to detect.
A) Masquerade
A masquerade takes place when one entity pretends to be a different entity.
A masquerade attack is an attack that use a fake identity to gain unauthorized access to personal information.
Attack on Authentication.
Replay attack involves the passive capture of a data unit and its subsequent retransmission to produce an unauthorized effect.
Replay attack is to replay the message sent to a network by an attacker, Which was earlier sent by an authorized user.
Modification of message simply means that some portion of a message is altered, or that messages are delayed or reorder, to produce an unauthorized effect.
Attack on Integrity.
The denial of service attack prevent the normal use or management of communications facilities.
sending large number of packets to block the server.
Attack on Availability.
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