If you have an encrypted drive, there are multiple ways to attempt to recover deleted files on the drive.
The first method is to use a data recovery tool. There are several commercial tools available that can scan an encrypted drive and attempt to recover files. One of the most popular options is WinUtilities Undelete, which is designed for recovering data from encrypted drives. The software not only has the ability to recover accidentally deleted files, but it can also extract data from formatted or corrupt partitions. It is also possible to preview recovered files before proceeding with a full recovery.
Another option is to use a Linux Live CD. This enables you to boot up a computer in a Linux environment and then access and mount the encrypted drive. Once the drive is mounted, it is possible to search for deleted files and potentially restore them. This method requires more technical skill, as you need to be comfortable working in the Linux environment and understand how to mount and search the drive.
The third option is to attempt to manually decrypt the data. If the encryption is based on a standard algorithm and key, then it may be possible to decrypt the data without a tool. One example of this is TrueCrypt, which uses a “machine-independent” key that can be used to decrypt the data without relying on a third-party tool. However, this method is only suitable if the encryption algorithm and key are known. If the encryption is unknown or uses a proprietary algorithm, then manual decryption will not be possible.
Whichever method you choose to attempt to recover deleted files from an encrypted drive, it is important to ensure that the data is backed up in a secure location before attempting any operations on the drive. This will protect the data in case of any unexpected difficulties encountered during the recovery process.