A company is developing a security policy for secure communication. In the exchange of critical messages between a headquarters office and a branch office, a hash value should only be recalculated with a predetermined code, thus ensuring the validity of data source. Which aspect of secure communications is addressed?

A company is developing a security policy for secure communication. In the exchange of critical messages between a headquarters office and a branch office, a hash value should only be recalculated with a predetermined code, thus ensuring the validity of data source. Which aspect of secure communications is addressed?

  • data integrity
  • non-repudiation
  • data confidentiality
  • origin authentication
    Answers Explanation & Hints:

    Secure communications consists of four elements: Data confidentiality – guarantees that only authorized users can read the message
    Data integrity – guarantees that the message was not altered
    Origin authentication – guarantees that the message is not a forgery and does actually come from whom it states
    Data nonrepudiation – guarantees that the sender cannot repudiate, or refute, the validity of a message sent

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