This is already present today in California Driver's licenses in your Apple Wallet (mDL). When you scan your driver's license at a compatible reader, you're gi

This is already present today in California Driver's licenses in your Apple Wallet (mDL). When you scan your driver's license at a compatible reader, you're given a notice of what information is being requested and the ability to share it (or not). It can also request some derived attribute (is this person above the age of 21?) instead of the actual data field itself. Most of this is from ISO/IEC 18013-5