Database Management Systems Mcqs

Page No. 29

Asymmetric Encryption: Why can a message encrypted with the Public Key only be decrypted with the receiver’s appropriate Private Key?


aNot true, the message can also be decrypted with the Public Key

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bA so called “one way function with back door” is applied for the encryption

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cThe Public Key contains a special function which is used to encrypt the message and which can only be reversed by the appropriate Private Key

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dThe encrypted message contains the function for decryption which identifies the Private Key

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Which of the following requires no password travel across the internet?


aReadable system

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bManipulation system

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cChallenge–response system

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dResponse system

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Which one of the following uses a 128bit round key to encrypt the data using XOR and use it in reverse to decrypt it?


aRound key algorithm

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bPublic key algorithm

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cAdvanced Encryption Standard

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dAsymmetric key algorithm

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Encryption of small values, such as identifiers or names, is made complicated by the possibility of __________


aDictionary attacks

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bDatabase attacks

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cMinor attacks

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dRandom attacks

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View Answer Dictionary attacks

In which of the following encryption key is used to encrypt and decrypt the data?


aPublic key

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bPrivate key

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cSymmetric key

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dAsymmetric key

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View Answer Symmetric key

Which of the following is not a property of good encryption technique?


aRelatively simple for authorized users to encrypt and decrypt data

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bDecryption key is extremely difficult for an intruder to determine

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cEncryption depends on a parameter of the algorithm called the encryption key

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dNone of the mentioned

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View Answer None of the mentioned

In a database where the encryption is applied the data is cannot be handled by the unauthorised user without


aEncryption key

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bDecryption key

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cPrimary key

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dAuthorised key

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View Answer Decryption key

___________ is widely used today for protecting data in transit in a variety of applications such as data transfer on the Internet, and on cellular phone networks.


aEncryption

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bData mining

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cInternet Security

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dArchitectural security

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View Answer Encryption

VPD provides authorization at the level of specific tuples, or rows, of a relation, and is therefore said to be a _____________ mechanism.


aRow-level authorization

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bColumn-level authentication

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cRow-type authentication

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dAuthorization security

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_______________ allows a system administrator to associate a function with a relation; the function returns a predicate that must be added to any query that uses the relation.


aOpenID

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bSingle-site system

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cSecurity Assertion Markup Language (SAML)

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dVirtual Private Database (VPD)

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