With smartphones becoming more affordable and tablets gaining popularity, more internal staff want to access corporate systems with their own devices--the BYOD phenomenon.

While BYOD can help mobile workers be more productive, it can also be a risk if not managed carefully. Compuware said 77% of its International CIO Study respondents indicated that consumerization of IT has become a business risk.

At Standard Chartered, BYOD is available with specific restrictions and the bank has so far enabled 2,000 personal iPads. According to Schofield, only the bank's corporate iPhone users can have their personal iPads enabled to access the corporate systems and apps. They are also restricted by the same rules and policies as other corporate devices when accessing internal systems and apps.

Although different policies can be put in place, augmented by device-management tools that automatically enforce them, Smith said user-education remains the last and most critical line of defense. He added that companies deploying corporate mobile devices require employees to sign documents to ensure they fully understand corporate policies. "It is key for employees to understand the responsible usage and the risk to the company," concluded Smith, "but the education factor is often missed out."