There are different definitions between security and confidentiality in data communication. the security is a technology for prevent to access to data like username and password but confidentiality for data are methods for decryption and encryption in data communication between source and destination because if you can get data after passing any security, You did not understand the information obtained , maybe you need to know a special key. anyway You have to understand what kind of sensitive data you have, and do a risk evaluation of what happens if data is exposed or gets in the wrong hands.
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