Development of a Secure Messenger Based on the ECMQV Algorithm, Immune to Man-in-the-Middle Attacks

Building on shortcomings and vulnerabilities of quick communication solutions, we propose a messenger that allows an exchange of confidential information through public channels without the risk of being compromised. All information is encrypted on-the-fly with a session key that is created using the ECMQV algorithm based on an automatic generation of ephemeral keys. This algorithm is immune to man-in-the-middle attacks and does not require additional resources such as a digital signature. The messenger uses the Kuznyechik encryption algorithm and the Streebog hash function, can be launched from various devices, since it does not require a GUI.