/əˈfɪʃəl ˈsiːkrəsi/ – Phrase
Definition: giữ bí mật công tác.
A more thorough explanation: Official secrecy refers to the practice of keeping certain information confidential or secret by government officials or public authorities in order to protect national security, public safety, or other legitimate interests. It typically involves restrictions on the disclosure of sensitive information to the public or unauthorized individuals.
Example: The government agency cited official secrecy as the reason for not disclosing certain classified information to the public.