We often take for granted the background processes and services that ensure the information we transmit over the internet or through a financial transaction is secured.

Our Prism-branded cryptography products and services not only provide security technology for financial institutions such as banks, retailers and the like, but have defined the very security standards upon which countless local and international organisations operate.

  • We were also the first cryptography provider globally to achieve PCI HSM version 2.0 certification (Prism TSM500i).
  • We were the first company in Africa to achieve FIPS140-2 (Federal Information Processing Standards) international security certification for our award winning Prism TSM410.
  • The TSM410 was a Top Technology 100 award winner.
  • As a longstanding member of the STS Association we played an integral role in setting the original STS standards for prepaid electricity vending, and are currently represented on the board of directors of the STS Association.

We have been developing Hardware Security Modules (HSMs) that are primarily aimed at the financial, retail, telecommunication, and utilities  sectors for over 20 years. Each new generation of HSMs we design, manufacture and support builds on the experience and expertise gained from the previous generation. The current generation of HSMs are the TSM500i and TSM250.

Prism TSM500 Series

The TSM500i Hardware Security Modules comes in two variants: a universal PCI-express bus device, and an NSS (Network Security Server) that provides transaction security services via TCP/IP using an Ethernet interface.


The TSM500i series HSMs offer an affordable high-security solution for issuers, processors/switches, acquirers and mobile network operators in the electronic payments industry. With the comprehensive documentation supplied, it is a straightforward process to manage and configure the TSM500 series HSMs using a web browser based interface. The TSM500 series HSMs provide transaction processing services via TCP/IP over an Ethernet interface. They are plug-in compatible with Postilion and Traderoot systems. Prism range of HSMs have been operating at over 1300 bank branches, at numerous payment processors/switches/acquirers/issuers and in trusted centres for over 20 years. All TSM500i (and TSM500) models are performance upgradeable on site, allowing customers to purchase a crypto solution that is suited to their existing processing needs and upgrade as their requirements change.

Available in a range of models from 20 TDES PIN translations per second upwards, the TSM500i-NSS offers the best combination of physical security, performance and price in the industry.


TSM500i-NSS is STS certified and offers the highest level of security for online vending systems and meter manufacturing environments. With the comprehensive documentation supplied, it is a straightforward process to manage and configure the TSM500 series HSMs using a web browser based interface.

Prism TSM250

The Prism TSM250 is an affordable Hardware Security Module (HSM) used in Standard Transfer Specification (STS) prepaid vending environments.

Featuring anti-tamper protection at a silicon level, the TSM250 is designed to meet PCI HSM v2.0 requirements, ensuring unparalleled system security along with complete peace of mind for the vendor.

USB-enabled for broad compatibility, the device offers a simple message-based programmer interface and supports both existing STS standards as well as the new STS standards for prepaid vending.

Supporting all modern Windows operating systems including XP, 2003, Vista, 7 and 8, the TSM250 offers utility suppliers the perfect offline solution for their prepaid and/or sub-metering needs.


Prism TSM250

Used in thousands of vending systems and manufacturing plants, spanning more than 80 countries

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