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We have support for ARMv8-M Architecture (Mainline and Baseline) as well as devices Cortex-M23 and Cortex-M33. The RTOS supports ARM TrustZone technology on Cortex-M and provides a secure and non-secure execution area.The UNISON RTOS supports ARM TrustZone technology on Cortex-M and provides a secure and non-secure execution area.

 ARM Demo diagram

Security for devices connected to the Internet of Things (IoT) or devices involved in Machine to Machine (M2M) communications is a critical part of all systems being designed today. This section describes the various aspects of security for the UNISON RTOS and how these features create solid and dependable protection.

The first step in security is end to end encryption and the two approaches to this that are seen as industry standards are:

  • ● TLS/SSL
  • ● IPSec
  • ● IP Filtering

The difference between these two approaches is that TLS can be used to set up a secure connection between applications on different machines but IPSec can be used to create a virtual private network which will encrypt all traffic across a link. At first glance it seems that the VPN is superior but they are more difficult to setup and all good security comes in layers.

  • ● Secure email using SMTP and TLS
  • ● Secure web server communication using HTTP and TLS for HTTPS

You might thing that secure shell access and secure FTP file access are achieved the same way. Some have done this; however the standards which are entirely new protocols which implement these features are:

  • ● SSH or secure shell
  • ● SFTP or secure file transfer

As mentioned above, both are completely new protocols, NOT telnet running over TLS and FTP running over TLS. SSH is used for secure configuration of target systems and SFTP is used for secure file transfer to/from target systems.

There is two additional security features in the UNISON RTOS. These are SNMP v3 and secure boot. SNMP v3 is secure for both authentication and transmission of data between the management station and the SNMP agent. There is no requirement for IPSec or TLS for this security.

The secure boot requires the files which are downloaded for reflashing the system to be encrypted and checked before loading. Using this approach, devices never need to be returned to the factory for upgrades and automatic failure of the updates are automatically detected. This is all part of the UNISON Bootloader.

In summary, UNISON RTOS includes all the security features that you need built into the environment and tested in the environment. This includes:

  • ● TLS/SSL
  • ● IPSec
  • ● Secure mail or secure SMTP
  • ● Secure web pages or HTTPS
  • ● Secure shell - SSH
  • ● Secure file transfer - SFTP
  • ● Secure management - SNMP v3
  • ● Secure Bootloader
  • ● Encrypted File System

UNISON RTOS has all the off the shelf security you need for security for MCUs, MPUs, and FPGAs.

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Rowebots Limited

RoweBots was founded in May 1987 by a group of Univer­sity researchers. From the outset, RoweBots had its roots in real-time multiprocessor software and has broadened into an embedded signal processing systems company today.

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