Authorize.net MD5 Hash End of Life July 09, 2019 20:43 Updated I received a message from Authorize.net. "MD5 Hash End of Life & Signature Key Replacement." Will this have any impact on Inform? No. We have ensured that Inform will continue to work with Authorize.net through these changes. Related articles Credit card processing rates Release Preview: Inform ERP v20 What's my version?