In dataflow, what can be a source of information leaks?

The correct choice highlights a significant risk related to data security during data processing. When computed transformations are used to merge information from records that have different security classifications, it can lead to unintended exposure of sensitive data. This merging can violate the boundaries established by the original data security policies, potentially allowing information that should remain confidential to become accessible to users or processes that do not have the appropriate clearance.

For example, if sensitive financial data is merged with publicly available data in a transformation step without sufficient safeguards, users can access combined results that reveal private information. Hence, the integrity of security policies is compromised, leading to information leaks.

The other options do not create such risks. Applying row-level security is designed to prevent information leaks by ensuring that users only access data appropriate to their role. Disabling user access during dataflow operations is a security measure aimed at protecting data during processing, thereby minimizing risk. Segregating datasets without transformations maintains distinct datasets without combining potentially sensitive information, thus safeguarding against leaks.