MD5 Enhances Emergency Notification Security announced an upgraded version of its Emergency Notification platform. In previous versions, a Hashing algorithm known as MD5 was utilized to secure confidential data. This new version has upgraded from MD5, to the more secure SHA256 Hash. is an acknowledgement-based notification platform. Every message sent to users —whether it be a PUSH notification, SMS text message, Email or Voice phone call— will be tracked by, in real time, for positive acknowledgement by the user.