A process using code segment which is installed over a transport medium, using a device, such as a network, for transmitting real-time end-to-end encrypted voice or data communications between at least a first digital device and a second device in real time is disclosed. The network includes a network portal for Registration, Key Management, Authentication, and Authorization of the first digital device and the second device. Accordingly, the devices are capable of securely communicating with each other in real-time by providing each digital device with at least first and second keys, and receives requests to communicate, provides authorization to set up a secure session, and encrypts and decrypts the voice and data messages sent to and received from the portal. The intent is to provide a low cost, COTS, real-time software voice and data encryption upgrade solution which is scalable, interoperable, and agnostic for all communications.