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Security

Boy Achternaam 17 questions

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Questions in this quiz (17)

  1. 1Describe the difference between authentication and authorisation.
    1. AAuthentication: proving identity; Authentication verifies who you are
      Authorisation: specifying access rights to specific services/ resources. What you are authorized to do.
    2. BAuthentication: specifying access rights to specific services/ resources. What you are authenticate to do.
      Authorisation: proving identity; Authorisation verifies who you are
  2. 2What is a hash function?
    1. AA hash function converts a document into a relative small value (e.g. 256 bits).
    2. BA hash function converts a document into a relative long values (e.g. 256 bits).
    3. CA hash function converts passwords into a secret value (e.g. 256 bits).
  3. 3Describe two attacks on hash-functions.
    1. Aa pre-image attack:
      given x, find y such that: H(y)=x

      collision resistance:
      find two messages x & y with same hash so H(x) = H(y)
    2. Brainbow table:
      search in a database for the hash that belongs to the passwords

      collision resistance:
      find two messages x & y with same hash so H(x) = H(y)
  4. 4Mention two well known hash-functions
    1. AMD5, SHA1, SHA2, SHA3
    2. BMD1, MD2, MD3, SHA2
    3. CBlowfish, MD5, JWT
  5. 5What is meant by message integrity?
    1. AThe certainty that a message has not been modified
    2. BThe certainty that a message has been modified
    3. CThe certainty that a message can been modified
  6. 6How can message integrity be obtained?
    1. AMessage integrity can be obtained by adding a MAC value (or an encrypted hash-value) to the message.
    2. BMessage integrity can be obtained by adding a JSON web token value (or an encrypted hash-value) to the message.
    3. CMessage integrity can be obtained by adding a MD5 value (or an encrypted hash-value) to the message.
    4. DMessage integrity can be obtained by adding a SHA3 value (or an encrypted hash-value) to the message.
  7. 7Describe the difference between a hash value and a message authentication code (MAC).
    1. AA MAC also serves the purpose of authentication.
      The MAC value is made with a key of the sender.
      A hash value can not be used for authentication.
    2. BA hash value serves the purpose of authentication.
      The hash value is made with a key of the sender.
      A MAC value can not be used for authentication.
    3. CA MAC also serves not the purpose of authentication.
      The MAC value is made with a key of the sender.
      A hash value can be used for authentication.
  8. 8Which key is part of a digital certificate?
    1. AThe public key of the owner
    2. BThe private key of the owner
    3. CThe hashed key
    4. DThe public key of the digital certificate
  9. 9Describe how digital certificates are signed.
    1. AFirst the hash value of the document is calculated and after that the hash value is encrypted with the private key of the (issuing) certificate authority.
    2. BFirst the certificate of the document is calculated and after that the certificate is encrypted with the private key of the (issuing) certificate authority.
    3. CFirst the hash value of the public key is calculated and after that the hash value is encrypted with the private key of the (issuing) certificate authority.
  10. 10Why is private/ public key cryptography called asymmetric?
    1. AAsymmetric because the key for encrypting is not equal to the key for decrypting.
    2. BAsymmetric because the key for decrypting is equal to the key for encrypting.
    3. CAsymmetric because the key for decrypting is not equal to the key for encrypting.

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Description
Quiz on Security, created by Boy Achternaam on 29/01/2018.
Language
English
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