A Modified Simon Cipher 4-Block Key Schedule as a Hash

In this paper, we explore the use of the Simon Cipher 4-block key expansion as the basis for an unkeyed hash function that is targeted toward RFID and Internet of Things applications with the benefit of reusing existing hardware. A modified Simon Cipher 4-block key expansion is used to create a construction that can be implemented to operate on the 2-block cryptographic data from the previous round, where the number of rounds required by hash are equal to number of rounds required by the cipher.