<span>A numeric string is created by a cryptographic
algorithm, which is called a hash that is used to validity of a message or authenticity
of a document. The signature is verified by an algorithm that uses the stated
owner of the signature's public key to accept or reject the authenticity of a
signature. A certification authority's digital signature is used to verify the
authenticity of digital certificates and other documents in a PKI.</span>
我沒有看到問題？如果您可以在此問題上發布問題，那將非常有幫助！
The union of two tables is basically the total of the two tables, so "or" questions would be my guess.
Answer:
Development task is the correct answer to the given question.
Explanation:
The database administrator is responsible for managing the database management system . The overall security of the database is depended on the database administrator.
The Development task include the following function
- Verification of the data model that is used by the database management system .
- Check the user input it means validating the data.
- Defining the overall requirement to create the model.
- Providing backup when the data is loss .
So the Development task is the correct answer.
