NTFS
A folder must be on NTFS to be encrypted using EFS.
Log files The encrypting file system EFS Disk quotas
Encrypting File System (EFS)
EFS stands for Encrypted File System and is used to encrypt folders and files in Windows XP or Vista.This encryption works ONLY when using the Windows NTFS file system!
Microsoft EFS stands for Encryption File System. This is used when you want to encrypt and protect your data and personal information from others by using a password.
Encrypting File System (EFS)
When using the Windows Encrypted File System (EFS), files are encrypted at the user level, meaning that only the user who encrypted the file can access it unless permissions are explicitly granted to others. EFS uses symmetric encryption with a randomly generated file encryption key, which is then protected by the user's password. Additionally, EFS seamlessly integrates with the Windows operating system, allowing users to encrypt files through the file properties dialog without needing additional software. However, it's important to back up encryption keys, as losing them can result in permanent data loss.
When you move an encrypted file from a Windows system to a Windows 8 or Windows 7 Home Premium computer, the file cannot be decrypted unless the destination system supports the same encryption method and the user has the appropriate decryption key or certificate. Specifically, if the file is encrypted using Windows' Encrypting File System (EFS) and the Home Premium edition does not support EFS, the file will remain inaccessible. Users should ensure they have a backup of the encryption keys or certificates to access the file on a compatible system.
EFS Encrypting File System
The key difference between EFS (Elastic File System) and EF (Entity Framework) is that EFS is a cloud-based file storage service, while EF is an object-relational mapping framework for .NET applications. If your use case involves storing and accessing files in a scalable and flexible manner, EFS would be more suitable. On the other hand, if you need to work with data in a relational database within a .NET application, EF would be the better choice.
To effectively manage the transition from Elastic File System (EFS) to Elastic File Manager (EFM), it is important to carefully plan and communicate the changes to all stakeholders. This includes assessing the compatibility of existing systems with EFM, training staff on the new platform, and ensuring a smooth migration process with minimal disruption to operations. Regular monitoring and evaluation of the transition process will also help identify and address any issues that may arise.
see http://support.microsoft.com/kb/941674