أمن شبكات الحاسب والانترنت

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    343

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    1(File Viruses: ) (

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    ( ) ( )

    Trojan Clickers

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    1. ) .Conventional Cryptography.(2. ) .Public Key Cryptography.(

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    . : . :: . . : ] : 2[

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    ):Certificate Policy (

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    15

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    ' Signature '

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    Digital Signature

    Digital Certificate

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    [email protected]

    17