10. Why should I use R-Crypto instead of using Encrypted File System (EFS) build into Windows XP/Vista, and above?
EFS has severe security concerns which R-Crypto doesn't:
* User's private keys are stored directly on the disk. Even system administrators can access them and therefore decrypt the data.
* Encrypted files, their names, sizes, etc. are visible.
* While decrypting EFS data, Windows creates a temp file with decrypted data. When Windows stops working with such file, it simply deletes it (without wiping). That file can then be recovered using data recovery software, R-Studio, for example.
See
Issues with EFS for more details.
There are some limitations in EFS, too: for example, EFS-encrypted folders cannot be shared over network.
13. How do I backup the data on an encrypted disk?
To backup your encrypted data you can copy an encrypted disk file-container to any backup storage: CD/DVD, tape, network backup location or any other storage device. Note that after backing up you will be able to connect your encrypted disk directly from the backup location, e.g. directly from the CD/DVD.
15. Is it possible to connect the same encrypted disk simultaneously by several users and how can I share an encrypted disk among the users?
Generally no, because this is only possible if all users connect the same encrypted disk in the write-protected mode. To share an encrypted disk among the users in the read/write mode do the following:
* Connect an encrypted disk emulating a fixed disk (please see the "Connect an Encrypted Disk" help topic for details) on one computer;
* Share the connected encrypted disk using standard Windows disk sharing properties among the network users. Note that using standard Windows disk sharing may result in a security vulnerability as the data will be transferred unencrypted over network.