Apple yesterday unveiled its new Face ID biometric technology and while the company spent a considerable amount of time talking about the security of the feature, some people are already showing doubt.

As noted by Recode, United States Senator Al Franken is pressing Apple to offer more detail on privacy and security safeguards….

In a detailed and thorough letter sent directly to Tim Cook, Franken expressed his concern that Apple could use the faceprints it collects from Face ID to benefit other aspects of its business or to aid in law enforcement requests.

Franken writes:

The senator, who is the chairman of the Senate Judiciary Subcommittee on Privacy, Technology and the Law, outlined a total of ten questions he has about Face ID. The questions range from concerns about security to concerns about diversity. For instance, the third question reads:

Franken also seems cornered about how Apple tested Face ID, asking where the 1 billion images it used to build Face ID came from.

Many of the concerns center around privacy, however, with Franken asking if Apple has implemented safeguards for when someone tries to trick Face ID:

When Phil Schiller unveiled Face ID, he touted that it’s more secure than Touch ID with Apple’s testing showing that there’s a much higher chance of someone matching fingerprints than face frame.

Apple has yet to respond to Franken’s letter, which can be viewed in full here. It’s unclear when or if Tim Cook will respond.