What is a HSM and how does it work for PTX? Cloud Payments Expert March 21, 2019 11:44 Updated Follow If you are interested in using a HSM with PTX, please see the related article: HSM Requirements HSMinfoPDF.pdf 300 KB Download Related articles What are the HSM requirements for PTX? How do I automate a submission? How do I find out what the difference is between a Direct and an Indirect submitter? What is Faster Payments? How do I manually install the Gemalto Certificates?