IEEE 802.21 MEDIA INDEPENDENT HANDOVER

DCN: 21-09-0044-00-0sec

Title: Security TG Call For Proposals

Date Submitted: March 11, 2009

Presented at IEEE 802.21 session #31 in Vancouver

Authors or Source(s):

 Yoshihiro Ohba (Toshiba), Lily Chen (NIST) and Shubhranshu Singh (Samsung)

Abstract: This document describes Call For Proposals for 802.21a and the down-selection process.

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IEEE 802.21 presentation release statementsThis document has been prepared to assist the IEEE 802.21 Working Group. It is offered as a basis

for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.

The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.21.

The contributor is familiar with IEEE patent policy, as stated in Section 6 of the IEEE-SA Standards Board bylaws <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf> 

802.21a Call For Proposals• Scope of proposals

• Work Item #1: Mechanisms to reduce the latency during authentication and key establishment for handovers between heterogeneous access networks that support IEEE 802.21

• Work Item #2: Mechanisms to provide data integrity, replay protection, confidentiality and data origin authentication to IEEE 802.21 MIH protocol exchanges and enable authorization for MIH services

• Proposals must be submitted to 802.21 Document Repository (https://mentor.ieee.org/802.21/documents)

• Group: Security

• Document Title: TGa_Proposal_Firstname_Lastname (e.g.,TGa_Proposal_Yoshihiro_Ohba)

• Submission Deadline: May 3rd (Sun), 2009, end of day AOE (Anywhere On Earth)

• After the submission deadline, no new revision of proposal is allowed until the end of May meeting

• For questions, please contact to Yoshihiro Ohba <yohba@tari.toshiba.com>, Chair of 802.21a Task Group

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Proposal Presentation & Down-Selection Process

The proposal presentation & down-selection process addresses the following issues:

1) giving enough buffer time between presentations in order to work out details and build consensus

2) providing material to group ahead of time to allow for more thorough review and allow focused discussion

3) having a rule to select suitable and proper proposals after three times of proposal presentations

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Timeline

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Harmonization

Draft StandardText is contributed to 802.21a draft standard

Call for Proposal (March 2009)

Presentation & Down-Selection (November 2009)

Proposals with Draft Text must be submitted 2-week prior to meeting

Proposal Presentation I (May 2009)Proposals must be submitted 1-week prior to meeting

Down-Selection fails

Regrouping

Harmonization

Proposal Presentation III (September 2009)Proposals with detailed text must be submitted 1-week prior to meeting

Proposal Presentation II (July 2009)Proposals with detailed text must be submitted 1-week prior to meeting

Harmonization

Down-Selection succeeds

5

Proposal Presentation

1. Proposals are made available one week prior to presentation time in order to allow for sufficient review time

2. No draft text needed at Proposal Presentation I , but detailed text is needed at Proposal Presentations II and III

3. Each proposal should use security TR document (21-08-0172-02-0sec) as design guidelines and requirements

4. Each proposal should follow the proposal guidelines (see Slides 12 – 17)5. A proposal may cover work item #1 or #2 or both

• A submitter may submit separate proposal(s) for each work item

6. A procedural motion may take place at the end of a presentation in Proposal Presentations I and II in order to provide feedback on a proposal

• Any revised proposal for Proposal Presentations II and III should address the received feedback, comments

7. New proposal is allowed in Proposal Presentation II, only if• It is extension of presentation in Proposal Presentation I , or • It addresses (part of) work item not yet already covered or presented in proposal

presentation I but described in TR document

8. Only revised proposals are allowed and No new proposal is allowed in Proposal Presentation III

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Proposal Presentation (cont’d)• Revised Proposal

• An updated proposal that captures any comments/feedbacks received during its earlier presentation

• New Proposal• The proposal which is either

– an extension (with entirely new thoughts e.g to capture any newly agreed requirement captured during previous presentation) of presentation in earlier Proposal Presentation , or

– it addresses (part of) work item not yet already covered or presented in proposal presentation I but listed in the TR document or Proposal Characterization List

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Presentation & Down-Selection

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1. Authors provide Draft Text for review two weeks prior to presentation

2. Written questions for clarifications to be submitted to the Task Group one week in advance Answers to these questions submitted within 3 days thereafter

3. A technical motion to approve Draft Text provided by the proposal and make it part of the IEEE 802.21a draft specification is brought forward to the TG at presentation time

4. A proposal containing multiple components can lead to multiple motions

5. Authors must indicate at presentation time how many motions they intend to bring forward to the TG

6. All motions are carried out at the end of all presentations7. Time allocated for presentations and motions is advertised in the

opening meeting 8. A technical motion at Down-Selection requires 75% to pass9. One member can vote on multiple motions

Presentation & Down-Selection (cont’d)10. In case no motion passes by 75%, the proposal receiving the most

number of votes is selected for another round of confirmation vote by the TG• More than one proposal can be selected at this stage in case

the most popular proposal does not cover all work items specified in the CFP

• Proposals are selected in decreasing order of popularity (# votes) received

• If this confirmation vote fails, Proposal(s) are broken up into several technical items and TG votes on each technical item

11. In case multiple proposals are approved by more than 75% they are integrated into the Draft Text• Proposers work with the Editing Committee which consists of

the Editor and the TG Chair in order to combine proposals• Conflict and overlaps are brought back to the TG to vote on• Failed proposals are eliminated from further consideration

12. In case no proposal is approved at the end of Down-Selection, the TG may need to regroup. The options include (1) refining the requirements document, (2) refining the evaluation and down-selection criteria, (3) reissuing a new call for proposals

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Down-Selection Flowchart

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TG vote on all proposals available

Proposal(s)* getting highest votes are subject to TG confirmation vote

Proposal(s) are broken up into several technical items;

TG votes on each technical item

Options are provided for each overlap area; TG votes on options available for overlap75% Approval?

Anyproposal

gets 75% Approval ?

Yes

No

Inclusion in draft specifications

Authors work w/ Editing Committee to integrate

text into draft specifications

No

Yes

Any contentious overlap**?

Option gets75% Approval?

Yes

Yes

No

Elimination from further consideration

NoTechnical item gets

75% Approval?

Yes

No

*There could be several proposals under consideration in order to cover different work items**Overlap is identified by Editing Committee, TG participants, and/or proposers; contention in resolving overlap is brought to TG for vote.

General Presentation Rule1. Proposals are categorized into the three groups

Presentation Group 1: Work Item #1Presentation Group 2: Work Item #2Presentation Group 3: Work Items #1 and #2 combined

2. Presentation order is random within each Presentation Group as determined by the TG Chair

3. Time allocated to each presentation is evenly distributed among all presentations in the same Presentation Group

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Proposal Guidelines

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Remark

• The purpose of Proposal Guidelines is to help submitters to make a good proposal so that it can convince the group to adopt it.

• The Proposal Guidelines shall not limit creative ideas and proposals.

• A proposal will not be disqualified for not following the Proposal Guidelines.

• On the other hand, a proposal is unlikely to be adopted if it cannot be evaluated or cannot fit in 802.21.

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Proposal Guideline - Proposal Characterization List

• Each presentation is expected to contain a Proposal Characterization List to help characterizing the proposal

• Please refer to security TR document (21-08-0172-02-0sec) to create a Proposal Characterization List

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Work Item #

Supported Functionality Reference to TR section(s)

Note

1 Proactive Re-Authentication 2.3.3

1 EAP Pre-authentication 2.3.2

1 Key Hierarchy and Derivation 1 2.3.3.1

1 Higher-Layer Transport for MN-CA, MN-SA and SA-CA signaling

2.3.2.3

1 Link-Layer Transport for MN-SA signaling 2.3.2.3

1 Authenticator Discovery Mechanism 2.3.2.3, 2.3.3.4

1 Context Binding Mechanism 2.3.2.3, 2.3.3.4

2 Access Authentication 3.6.1

2 MIH-Specific Authentication 3.6.2

2 Key Hierarchy and Derivation 2 3

2 MIH-Specific Protection 3.6.1.1, 3.6.2.1

2 Protection by MIH Transport Protocol 3.6.1.2, 3.6.2.2

2 Visited Domain Access 3.6.3.1 Visited MIH services have the same security policies

An Example Proposal Characterization List

Proposal Guideline – Refer to 802.21

• Each proposal is expected to make a clear reference to 802.21 with regard to

• 802.21 entities: If a new 802.21 entity is introduced for proposed security solutions, then address the relation, location, and interface with other 802.21 entities.

• Reference points: if new reference point(s) are introduced, then define and identify the reference point(s) w.r.t the MIHF communication model specified in the 802.21 spec.

• Data fields: if for protected messages, new data fields are introduced, then specify them in 802.21 data format.

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Proposal Guideline – Assumptions

• If a proposal relies on assumptions which are not described in the 802.21 standard, then explicitly state them to avoid any confusion and long debate, for example,

• if a proposal relies on transport protocols to apply security protection for MIH information, then include the transport protocols and security protections assumed for the protocols;

• if AAA server is employed, then state it;

• If a cryptographic key is used, then state how the key is established, etc

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Proposal Guideline – Rationale

• Provide clear rationale and discussions about the proposed content to help the evaluation and acceptance. This may include but not limited to:

• Security objectives;

• Attacks to protect against;

• Security performance tradeoffs;

• Comparisons with other solutions, if any;

• Current standards (re-use);

• Etc.

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