Q. A small program that changes the way a computer operates.

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Q. A program that copies itself.

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Q. An attack in which the site is not capable of answering valid request.

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Q. A cipher in which the order is not preserved.

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Q. Plain text is the data after encryption is performed.

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Q. A unique piece of information that is used in encryption.

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Q. Study of creating a d using encryption and decryption techniques.

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Q. Creating a computer or paper audit that can help detect wrong doings.

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Q. An indirect form of surveillance.

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Q. A malicious code hidden inside a seemingly harmless piece of code.

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Q. Attack in which a user creates a packet that appears to be something else.

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Q. A technique in which a program attacks a network by exploiting IP broadcast addressing operations.

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Q. An attack in which the user receives unwanted amount of e-mails.

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Q. These ciphers replace a character or characters with a different character or characters, based on some key.

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Q. Encryption is the study of creating and using decryption techniques.

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Q. A type of cipher that uses multiple alphabetic strings.

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Q. An encryption technique with 2 keys is ______________

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Q. In public key cryptography, a key that decrypts the message.

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Q. DES stands for?

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Q. Under DES, the data encryption standard took a 64-bit block of data and subjected it to ______ levels of encryption.

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