Engineers at Mitsubishi have developed a one-time password system for use on mobile Internet services that is intended to answer the security concerns of corporate network managers about rolling out access to internal resources via cellular handsets.

As penetration of mobile Internet services increases, companies are looking to make available internal resources such as databases or e-mail boxes to their workers on the road. A potential problem at present lies in the password, which is often nothing more than a handful of numbers and letters and can be easily glanced at by fellow passengers on crowded trains.

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