The issue focused on their systems, whose software uses machine learning algorithms to predict who will make the bank's electronic payment system work and also how well it will do in other areas.

Vishal Vaidya, co-founder of technology company digital marketing firm GreenQuill, said that once users were given such data, they would be more likely to take online payments. "This was a major concern for us," he said.

It is not clear what impact the Data Protection Act will have