[1] Commercial National Security Algorithm Suite and Quantum Computing FAQ U.S. National Security Agency, January 2016.

[2] Merkle, R. C. (1988). "A Digital Signature Based on a Conventional Encryption Function". Advances in Cryptology — CRYPTO '87. Lecture Notes in Computer Science. 293. p. 369. doi:10.1007/3-540-48184-2_32. ISBN 978-3-540-18796-7.

[3] US patent 4309569, Ralph Merkle, "Method of providing digital signatures", published Jan 5, 1982, assigned to The Board Of Trustees Of The Leland Stanford Junior University

[4] LevelDB – Fast and Lightweight Key/Value Database From the Authors of MapReduce and BigTable

[5] Google Open-Sources NoSQL Database Called LevelDB

[6] LevelDB Project @ Google code

[7] Blum, Manuel; Feldman, Paul; Micali, Silvio (1988). "Non-Interactive Zero-Knowledge and Its Applications". Proceedings of the twentieth annual ACM symposium on Theory of computing (STOC 1988): 103–112. doi:10.1145/62212.62222.

[8] Wu, Huixin; Wang, Feng (2014). "A Survey of Noninteractive Zero Knowledge Proof System and Its Applications". The Scientific World Journal. 2014: 1–7. doi:10.1155/2014/560484. PMC 4032740  . PMID 24883407.

[9] Blum, Manuel (1986). “How to Prove a Theorem So No One Else Can Claim It”. ICM Proceedings: 1444-1451.