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. 2014 Mar 11;14(3):5004–5040. doi: 10.3390/s140305004

Algorithm 3 Temporary hash chain generation of a message-specific puzzle.

1: Get N1 from input
2: X1H160(N1)
3: Store X in RAM or EEPROM.
4: for i = 2 to I do
5: XiH160(X)
6:  Store Xi in RAM or EEPROM.
7: end for