 This makes the Merkle signature scheme very adjustable and resistant to quantum computing.Note that Merkle signature is a "one time signature" with finite signing potential; the work of Moni Naor and Moti Yung on signature based on one-way permutations and functions (and the invention of universal one-way hash function) give a way to extend a Merkle like signature to a complete signature scheme.The Merkle signature scheme can be used to sign a limited number of messages with one public key formula_1.