EARLIER: Apple's new iPhone 5s features a fingerprint scanner built-into its Home button.
Critics have raved about the speed and accuracy of the sensor, which can be used to unlock your phone with a press of your finger. It's anticipated it will also be used for logging onto apps, and online payments.
But Al Franken, a senior US senator who chairs the Senate Judiciary Subcommittee on Privacy, says the technology raises "substantial questions about privacy."
In a letter to Apple (see RAW data below), the Minnesota Democrat asks:
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Via Chuck Sherwood, Senior Associate, TeleDimensions, Inc