Smart Cash uses the Keccak algorithm 

Keccak is a SHA-3 hashing algorithm used in cryptocurrencies like 365Coin and Maxcoin. The hashing algorithm makes it virtually impossible to mine the cryptocurrency using ASIC hardware since smartcash asic miners are released.

Keccak is a family of sponge functions. The sponge function is a generalization of the concept of cryptographic hash function with infinite output and can perform quasi all symmetric cryptographic functions, from hashing to pseudo-random number generation to authenticated encryption.