Feature: Memory
addressing cybersecurity vulnerabilities and testing applications, as well as soſt ware and hardware components, to mitigate risks. T e compliance of vehicle electronic
systems is expected to become mandatory in the 2024-2026 timeframe.
First line of defence SSDs are increasingly becoming the mass storage of choice. T eir lack of moving parts delivers advantages such as silent operation, high reliability, robustness and low power consumption. Moreover, fast data read and write times ensure fast response and high system performance. It is common to encrypt user data stored
on the SSD to protect privacy, preventing hackers from physical access into the systems. Traditional full-disk encryption is performed by a soſt ware module in the operating system. Data is retrieved from the disk in encrypted form and transferred across the PCIe/SATA interface before being decrypted in the computer. Alternatively, a self-encrypted drive
(SED) contains its own hardware to handle encryption and decryption; see Figure 1. T e drive controller in the operating system manages processes including pre-boot authentication of the drive, key management and interaction with secure components such as a Trusted Platform
Figure 1: The principle of operation of a self-encrypted drive (SED)
Figure 2: The eFuse is inaccessible and contains unique passwords that prevent unauthorised fi rmware from completing the signature verifi cation process needed to start the FerriSSD
Figure 3: FerriSSD range of secure modules (dimensions in millimeters)
www.electronicsworld.co.uk February 2024 37
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