We received an email from Magento today, March 4th, 2019, advising the following: On March 14, 2019, Authorize.net will stop supporting MD5 based hash usage. Magento’s implementation of the Authorize.Net Direct Post payment method uses MD5 based hash and this change will result in Magento merchants not being able to process payments using Authorize.Net Direct… Continue reading Magento using Authorize.net stops supporting MD5