INSTRUCTIONS ON HOW TO DECRYPT AN ENCRYPTED SHARE ON SYNOLOGY NAS SYSTEMS USING A LINUX PLATFORM
1) Create a mount point on your linux platform e.g. /mnt/synology - sudo mkdir /mnt/synology
2) Mount the encrypted drive or directory at this mount point; here's how if it's a synology network share: mount -t cifs -o username=TYPE THE USER LOGIN NAME FOR THE SHARE HERE,password=TYPE THE LOGIN PASSWORD HERE //NAS_SERVER_IP/ENCRYPTED VOLUME /mnt/synology
This will mount the encrypted share to /mnt/synology; check you can see the content by typing ls -l /mnt/synology.
3) Now make another mount point, this time it's for the decrypted content - sudo mkdir /mnt/synology_decrypt
4) Install ecryptfs-utils on your linux platform (sudo apt-get install ecryptfs-utils).
5) Now mount the encrypted volume at the new mount point using this command:
mount -t ecryptfs /mnt/synology_decrypt
6) At the prompt, enter the passphrase or password (not the exported key) you used to encrypt the volume on synology originally.
7) Choose AES as the cipher.
8) Select 32bit.
9) Choose no for plain text passthrough.
10) Choose yes for filename encryption.
11) Your decrypted content will be accessible at the new mount point: cd /mnt/synology_decrypt/