Posts Tagged ‘NAS’

ASUSTOR advertises secure AES encryption with a 256-bit key. According to the manufacturer, AES-256 encryption is made available through the entire range of its current NAS devices. Unlike other manufacturers, ASUSTOR is very upfront regarding the type of encryption employed by its NAS devices: “ASUSTOR NAS offers folder based military grade AES 256-bit encryption”. As a result, we’re once again dealing with folder-based encryption running on top of the open-source encrypting file system eCryptfs. We’ve already seen eCryptfs-based encryption in attached storage devices made by Synology and TerraMaster. Does ASUSTOR have any surprises, or will its implementation of folder-based encryption suffer from the many restrictions and limitations? Let’s find out.

TerraMaster is a relatively new company specializing in network attached storage and direct attached storage solutions. The majority of TerraMaster NAS solutions are ARM64 and Intel-based boxes aimed at the home and SOHO users. TerraMaster’s OS (TOS) is based on Linux. At this time, TOS 4.1 is the current version of the OS.

Thecus has been manufacturing NAS devices for more than 15 years. The company develops an in-house Linux-based NAS OS, the ThecusOS. At this time, the most current version of the OS is ThecusOS 7. Thecus advertises secure data encryption in most of its NAS devices. The company’s volume-based encryption tool allows users to fully encrypt their entire RAID volume, defending essential data in instances of theft of the physical device. We found Thecus’ implementation of encryption somewhat unique. In this research, we’ll verify the manufacturer’s claims and check just how secure is Thecus’ implementation of 256-bit AES encryption.

Home users and small offices are served by two major manufacturers of network attached storage devices (NAS): QNAP and Synology, with Western Digital being a distant third. All Qnap and Synology network attached storage models are advertised with support for hardware-accelerated AES encryption. Encrypted NAS devices can be a real roadblock on the way of forensic investigations. In this article, we’ll review the common encryption scenarios used in home and small office models of network attached storage devices made by Synology. (more…)