What is another word for letter security?
Pronunciation: [lˈɛtə sɪkjˈʊ͡əɹɪti] (IPA) 
Letter security refers to a set of measures implemented to ensure the confidentiality, integrity, and availability of letters or documents transmitted via different means. More often than not, letters contain sensitive information that must be kept secure from unauthorized access or interception. There are various synonyms for the term "letter security," including document protection, data privacy, information lockdown, message encryption, and mail safeguarding. These terms all refer to the same principle of maintaining the security and confidentiality of information exchanged through written correspondence. Whether through physical or electronic means, letter security remains a crucial aspect of communication, especially in this era of advanced technological innovations, where cyber threats and data breaches are rampant.
