Difference between revisions of "Mobile Driver's License Presentation"
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Revision as of 17:17, 15 January 2021
Contents
Full Title or Meme
Mobile Driver's License Presentation maps ISO 18013-5 wallet presentation to DIF Presentation Exchange.
Context
- The DIF Presentation Exchange is looking for test cases. This is such a test case (ie a use case with teeth).
- This use case looks at the wallet as the source of Presentation Statements, which is not necessarily the full scope of the DIF WG.
Actors
- Holder = The entity that submits proofs to a Verifier to satisfy the requirements described in a Presentation Definition (may or may not be the subject)
- mDL holder = individual to whom an mDL is issued = legitimate holder of the driving privileges reflected on an mDL = subject of the mDL
- Device = smartphone or similar with a trusted wallet (in the ISO docs this is conflated with the doc that resides on the device (aka mdoc)
- Verifier = The entity that defines what proofs they require from a Holder (via a Presentation Definition) in order to proceed with an interaction.
- mDL verifier = entity using an mDL reader to verify an mDL
- Issuing Authority = trusted signer of data elements
- Trust Authority = TBD source of certs
Transaction
- The holder and verifier establish a session
- The verifier asks for mDL data
- mDL send data by value or by reference
- The verifier may or may not request other data
- Transport can be by various NFC or QR code.
- Format is CBOR - represented here as json.
Security
| data | mDL | DIF | Comments |
|---|---|---|---|
| Encryption | Encrypting with authentication of the mdoc requests and mdoc responses protects mdoc data from eavesdropping and alteration. | out-of-scope | it is not clear how mDL protection of alteration is meant to work |
| session keys | standard ephemeral key ECDH to establish session keys | out-of-scope | etc... |
| Reader <-> Trust authority | TLS | out-of-scope | etc.. |
| Reader <-> Holder | n/a | assurances as to the provenance, identity, or status of a Presentation Definition from digital signatures may be required | DIF seems to be voluntary with no way for holder to make requirements known. |
| channel | on-line (limited set) or off-line | on-line only channel left open | etc.. |
| privacy | supports selective release | not addressed | etc.. |
Request
| data | mDL | DIF | Comments |
|---|---|---|---|
| Device request | The point of this piece is the assurance that the device is trustworthy | Presentation Request | etc... |
| version | tstr | DIF information | etc... |
| Security | 3 Bits | 5 Bits | etc.. |
DIF Example
{
"id": "drivers_license_information",
"name": "Fred's Bar and Grill",
"purpose": "Proof of age",
"metadata": {
"client_id": "4fb540be-3a7f-0b47-bb37-3821bd766ed4",
"redirect_uri": "https://yourwatchful.gov/verify"
},
"schema": [
{
"uri": "https://yourwatchful.gov/drivers-license-schema.json",
"required": true
}
],
"constraints": {
"fields": [
{
"path": ["$.expirationDate"],
"filter": {
"type": "string",
"format": "date-time",
"min": "2020-12-31T23:59:59.000Z"
}
}
]
}
}
Response
Reference
- GitHub issues of the Presentation Exchange.
