The use of mobile handheld devices is expanding rapidly both within the business and individual context. These devices are now essential tools that offer competitive business advantages in today's growing world of ubiquitous computing environment. The technology advancement has made it possible to embed more facilities in mobile phones. While they provide benefits, they also pose new risks on security either by the information they contain or information that they can access remotely. Secure cash transaction is of serious concern in growing use of cash cards and internet transactions.