gs gs117 Database Programming Techniques - Encryption and Its Applications - Quiz No.1
gs gs117 Database Management System Quiz
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Question 1: ___________ 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.
Encryption
Data mining
Internet Security
Architectural security
Question 2: In a database where the encryption is applied the data is cannot be handled by the unauthorised user without
Encryption key
Decryption key
Primary key
Authorised key
Question 3: Which of the following is not a property of good encryption technique?
Relatively simple for authorized users to encrypt and decrypt data
Decryption key is extremely difficult for an intruder to determine
Encryption depends on a parameter of the algorithm called the encryption key
None of the mentioned
Question 4: In which of the following encryption key is used to encrypt and decrypt the data?
Public key
Private key
Symmetric key
Asymmetric key
Question 5: Encryption of small values, such as identifiers or names, is made complicated by the possibility of __________
Dictionary attacks
Database attacks
Minor attacks
Random attacks
Question 6: Which one of the following uses a 128bit round key to encrypt the data using XOR and use it in reverse to decrypt it?
Round key algorithm
Public key algorithm
Advanced Encryption Standard
Asymmetric key algorithm
Question 7: Which of the following requires no password travel across the internet?
Readable system
Manipulation system
Challenge–response system
Response system
Question 8: Assymmetric Encryption: Why can a message encrypted with the Public Key only be decrypted with the receiver’s appropriate Private Key?
Not true, the message can also be decrypted with the Public Key
A so called “one way function with back door” is applied for the encryption
The Public Key contains a special function which is used to encrypt the message and which can only be reversed by the appropriate Private Key
The encrypted message contains the function for decryption which identifies the Private Key
Question 9: Which is the largest disadvantage of symmetric Encryption?
More complex and therefore more time-consuming calculations
Problem of the secure transmission of the Secret Key
Less secure encryption function
Isn’t used any more
Question 10: Which is the principle of the encryption using a key?
The key indicates which function is used for encryption. Thereby it is more difficult to decrypt an intercepted message as the function is unknown
The key contains the secret function for encryption including parameters. Only a password can activate the key
All functions are public, only the key is secret. It contains the parameters used for the encryption resp. decryption
The key prevents the user of having to reinstall the software at each change in technology or in the functions for encryption
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