"These are not people dialing up to buy consumer products, " says Bob Carlson, chief of technical services at Hongkong Bank.

CNN: Cash -- or E-Money?

John Richardson, chief executive of Transport and Technical Services, said the department was aware of the smell and doing all it could to stop it.

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"What this research found is really little cracks in Android -- not great big security holes you could drive a truck through, " said Kevin Mahaffey, co-founder and chief technical officer of Lookout Mobile Security, a leading provider of security apps and services for Android devices.

CNN: 'No permission' Android apps can see and share your data