1. Double Ratchet Algorithm. https://www.signal.org/docs/specifications/doubleratchet
2. Our Source Code. https://github.com/SMC-SMU/Forward-secure-DualRing
3. X3DH Key Agreement Protocol. https://signal.org/docs/specifications/x3dh
4. Lecture Notes in Computer Science;M Abe,2002
5. Adida, B.: Helios: web-based open-audit voting. In: USENIX Security Symposium, 17, pp. 335–348 (2008)