![]() ![]() It uses a symmetric encryption algorithm because it takes a smaller amount of time to encrypt and decrypt large amounts of data than if an asymmetric key cipher is used. In other words, encryption of files is only as strong as the password to unlock the decryption key.ĮFS works by encrypting a file with a bulk symmetric key, also known as the File Encryption Key, or FEK. However, the cryptography keys for EFS are in practice protected by the user account password, and are therefore susceptible to most password attacks. In the Microsoft Windows family of operating systems EFS enables this measure, although on NTFS drives only, and does so using a combination of public key cryptography and symmetric key cryptography to make decrypting the files extremely difficult without the correct key. The most widely accepted solution is to store the files encrypted on the physical media (disks, USB pen drives, tapes, CDs and so on). ![]() User authentication and access control lists can protect files from unauthorized access while the operating system is running, but are easily circumvented if an attacker gains physical access to the computer. 5 New features available by Windows versionĭoes not cite any references or sources.3.1.2 Accessing private key via password reset.3.1.1 Decrypting files using the local Administrator account. ![]()
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