Encryption algorithms are becoming

more necessary to ensure data is securely transmitted

over insecure communication channels. FOX is

a recently developed algorithm and its structure is

based on the already proven IDEA (International

Data Encryption Algorithm) cipher.

FOX is a symmetric (private key) block cipher. Its

top-level structure uses the Lai-Massey scheme and

the round functions used in the scheme are substitution

permutation networks (SPN). Its flexibility lies

in the fact that it can be efficiently implemented in

hardware and software. We report some of the first

results of implementing the cipher on an FPGA