HL7 FHIR Security 2017-03-14

Call Logistics

Weekly: Tuesday at 05:00 EST (2 PM PST)

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Back to HL7 FHIR security topics

Attendees

	Member Name			Member Name			Member Name
x	John Moehrke Security Co-Chair		x	Kathleen Connor Security Co-Chair		x	Alexander Mense Security Co-chair
x	Suzanne Gonzales-Webb CBCC Co-Chair		.	Johnathan ColemanCBCC Co-Chair		x	Mike Davis
.	Reed Gelzer RM-ES Lead		x	Glen Marshal		.	Galen Mulrooney
.	Dave Silver		.	Rob Horn		.	Judy Fincher
.	Diana Proud-Madruga		.	Beth Pumo		.	Oliver Lawless
.	Bob Dieterle		.	Mario Hyland		.	Joe Lamy
.	Rick Grow		.	[mailto: Richard Etterma]		.	[mailto: Wayne Kubic]

Agenda

• Roll;
• approval of agenda
• approval of the HL7 FHIR Security 2017-02-28 Minutes
• All security open http://gforge.hl7.org/gf/project/fhir/tracker/?action=TrackerItemBrowse&tracker_id=677&tracker_query_id=4967
• What are the "Frequently Asked Questions" regarding Security and Privacy?
  • Input from the Mobile group?
  • Tactical Security
    • Device security, cloud security, big-data security, service-to-service security, etc.
    • Point at NIST https://nccoe.nist.gov/projects/building_blocks/mobile_device_security
    • Point at OWASP https://www.owasp.org/index.php/Mobile_Top_10_2016-Top_10
    • Each of the 10 risks has a drill down page such as https://www.owasp.org/index.php/Mobile_Top_10_2016-M3-Insecure_Communication
  • Transport Security
    • TLS - Server Auth
    • TLS - Mutual Auth
    • Problems with crypto deprecation (aka SHA1)
  • Privacy Consent
    • Consent Resource
    • Use of Questionnaire to interact with patient with result as a Consent
    • Use of Consent Resource to point at evidence -- consent locator
    • Use of Consent Resource to hold consented rules
    • Interaction between Consent Resource and AuthZ decision engine (e.g. XACML)
      • Push vs Pull vs Service
        • Push: When a consent is gathered, the AuthZ data is updated as well as a Consent resource stored; therefor when an AuthZ decision needs to be made all the consent knowledge is contained within the AuthZ environment
        • Pull: When a AuthZ decision is made, the Consent Resource is interrogated as a PIP. Thus the FHIR Server holding consents are viewed as a PIP from the AuthZ architecture perspective.
        • Consent as a service --- See HEART use of UMA -- Patient interacts in non-standardized ways with a UMA authority. All actors wanting access to FHIR Resources get re-directed toward UMA service for AuthZ decision.
  • AuthN + AuthZ -- OAuth vs SAML vs TLS-mutual-Auth
    • SMART
    • HEART
    • IHE IUA
    • Interaction with Consent
  • Audit Logging
    • Genera need (See general security frameworks like NIST 800-53)
    • Use AuditEntry
  • Provenance
    • Provenance as a standalone resource
    • provenance elements as part of resources -- see W5 report
    • provenance as parts of containers like DocumentReference, Composition, Message, etc
  • Other?
• New business?

Outline for Security & Privacy Module

Use this CR or create a set of new CR as needed.

• • 10579 New Security and Privacy "Module" page needs content ()

http://build.fhir.org/secpriv-module.html

Use of Security Labels

From email discussion between Kathleen and John -- Summary by John

The FHIR community is unclear on how how to use the security-labels. When is it appropriate to use each type. Where is it appropriate to use each type? Specifically what are the risks they need to consider.

I agree with this.. This is hardly understood by the core people in the security wg... I am however concerned at declaring any specific policy -- such as the sensitivity codes shall never be used.

Seems we could create a few scenarios that outline proper use, and include description of the security considerations that went into that use.

1) Use of HCS tags within a highly-trusted environment (All inside my security boundary, within my own trust environment. my own trust framework). -- This is minimally use between the Access Control services and the REST server, including use of an SLS to enable access control decisions. I could see this highly-trusted environment being bigger than this, but think that most people need to understand that exposing the full HCS security-labels does present a risk.

2) Exposure of Resources to a Moderate-Trusted environment (They are outside my security boundary, but we have a trust framework that assures me they can protect sensitive information and follow obligations) -- the HIE environment. As you say, where _confidentiality and obligations. This is where we can talk to Bundle being a high-water, of only the _confidentiality codes; and where obligations would go.

2.1 ) The placement of obligations seems important enough that we should have a specific scenario just for that, so as to highlight it.

3 ) Having a USA specific example using 42 would be useful too. This is a rollup of all the things we want to say. I think it is okay to be USA centric, but when we do this we should explain the situation in terms that are not overly USA centric.

4) Use of HCS tags when in a low-trusted environment (I trust they will not expose what I give them, but they have limited ability to protect highly sensitive information or to enforce obligations) -- Where you are going to block access to anything sensitive. Showing that blocking access might be silent, or might be explicit (we have outlined this in the http error codes for security). Both are useful policy choices.

4.1 ) do we include your concern around returning obligations only when you KNOW that the recipient will enforce them? It needs to be said somewhere. Here might be good place.

5) Always good to remind people that they are not to expose information when the trust is not there.

Not sure if it is proper to use highly-trusted, moderate-trusted, and low-trusted -- I think the trust framework is key

is this what you are proposing? Did I miss a concept? I think this would be a good discussion today.

Access Control

• Outline for a FAQ improvement on the module page
• Access Control
  • Access Control diagram from Mike (Inputs – Decision – Enforcement – Outputs)
  • Using OAuth
    • Identity
      • Leverage OpenID Connect
      • Federate (cross-reference, mapping) to local identity descritions
        • Informally, or Formally
    • Roles
      • Using Standard roles from HL7
      • Using local codes
      • Clearance
    • Scopes
      • Using SMART scopes
        • Basic starter set
        • Supports Organizational use-cases with simple consent
        • Doesn’t support fine-grain
        • Doesn’t support complex consent
      • Using HEART – UMA
    • Using Cascading Authorization Servers
      • Bridging SMART and UMA and organizational requirements
  • Using Security labels
    • HCS conformance
      • MUST have a _confidentiality value (1..1)
      • Use of persistence label
      • Bundle use of security_tags – high-water
      • Comprehensive security_tags on each resource communicated to a trusted peer
      • Using security lables from a consent directive (privacy policy) on goverened resources
      • Using Clearance with security labels
  • Bring in stuff from the Privacy Consent Implementation Guide (Consent IG)
    • TODO
  • Should we create a new page, parellel with security.html -- privacy.html
    • Privacy Principles
    • Consent as a way to control Collection/Use/Disclosure
    • ISO four models (In, Out, In with exceptions, Out with exceptions)
  • Trust Framework
    • impact on the Conformance resource published by partners.
    • Establishing trust Contracts between trading partners