Breaking single DES

[Geoffrey Devantier]

Hi Everyone   I work for a company in South Africa which develops security solutions for the financial (Banks, Mastercard, Visa etc.) and pre-payment(Cell -phone payment etc.) industries. We are having significant difficluties in persuading various clients that single DES based systems are not secure. While I could go and buy a DES cracking machine (for under $1000) I was hoping that someone would be able to enlighten me on any any PC based single DES cracking software (distributed cracking software is great!). If anyone could help I would really appreciate it.   Thanks Geoff