The technology enables files to be transparently encrypted to protect confidential data from attackers with physical access to the computer. Basic ideas · Operation · Security · Supported operating systems
The Encrypted File System (EFS) provides an additional level of security for files and directories. It provides cryptographic protection of individual files.
EFS is a feature in Windows that allows you to encrypt files and folders. When you enable EFS, your data becomes unreadable without the correct decryption key.