Add reference to IETF cross device security doc

[bitbucket-import-issues]

Originally submitted by josephheenan (Joseph Heenan) on 2022-11-23

FAPI-CIBA should probably reference https://datatracker.ietf.org/doc/draft-kasselman-cross-device-security/

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Bitbucket status: resolved

Bitbucket origin: issue 556

[bitbucket-import-issues]

Originally submitted by dgtonge (Dave Tonge) on 2024-08-14

https://datatracker.ietf.org/doc/draft-ietf-oauth-cross-device-security/

[bitbucket-import-issues]

Originally submitted by dgtonge (Dave Tonge) on 2025-01-22

https://bitbucket.org/openid/fapi/pull-requests/530

[bitbucket-import-issues]

Originally submitted by dgtonge (Dave Tonge) on 2025-01-22

Still need to add to some of the relevant notes and security considerations

[bitbucket-import-issues]

Originally submitted by Nat (Nat Sakimura) on 2025-02-26

Merged in issue-556 ((Bitbucket #530)) Fixed #556

Add reference to Cross Device flow

Approved-by: Nat Sakimura
Approved-by: Lukasz Jaromin

→ <<cset 804b21b2276b>>