Artur Valiulin. Architecture of The PRIVATGRAM Secure Corporate Messenger for Critical Infrastructure Based on X3DH And Double Ratchet Protocols. tajet [Internet]. 2026 May 31 [cited 2026 Jun. 20];8(05):159-64. Available from: https://www.theamericanjournals.com/index.php/tajet/article/view/8077