Document encryption is the process of converting plain text documents into encoded text that can only be read by someone with the appropriate decryption key. This is typically done to protect the confidentiality of the information contained in the document and to prevent unauthorized access. Document encryption can be used to secure a wide range of digital documents, including text documents, spreadsheets, and presentations.
There are many different methods and algorithms that can be used for document encryption, each with its own strengths and weaknesses. Some common encryption methods include symmetric key encryption, which uses the same key for both encryption and decryption, and asymmetric key encryption, which uses a public key for encryption and a private key for decryption.
Document encryption is often used in combination with other security measures, such as password protection and digital signatures, to provide an additional layer of protection for sensitive information. It is important to choose an encryption method that is strong and secure, and to keep the decryption key or keys safe and secure in order to prevent unauthorized access to the encrypted documents.