Sunday, October 7, 2007

 

Traffic analysis

Second type of passive attack is traffic analysis.

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    Release of message content

    the release of message content is easily understood by figure. A telephone conversation, an E-mail messages, and file transfer can be easily accessed without effecting the message.

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    Denial of services

    This attack may have a specific target; for example, an entity may suppress all messages directed to a particular direction

    Another form of services denial is the disruption of an entire network, either by disabling the network or by overloading it with messages so as to degrade performance.

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    Modification of messages

    Modification of messages simply means that some portion of messages are modified,or delayed or recorded to produce an unauthorized effect.

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    Replay

    Replay involves the passive capture of a data unit and its subsequents retransmission to produce an unauthorizes effect.

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