The Windows Hello Internals: a Protocol Perspective Obaid Farooqi What Is Windows Hello

The Windows Hello Internals: A Protocol Perspective Obaid Farooqi What is Windows Hello A new way of logging in to your device Uses PIN or Gesture (Finger Prints, Face Recognition) instead of Password Uses Asymmetric keys for Authentication PIN or Gesture unlocks the keys Container Uses Two-factor authentication. Keys are different on different hardware and only work on one machine. Uses TPM for storing Private key. Even the OS does not know Private key. Domain controllers have only knowledge of Public key. If DC gets compromised, all hacker gets is public keys Three Different Types of Deployments Cloud Everything is in Azure Hybrid All provisioning happens in Azure and then Public Key is replicated to on- premises DC. On-Premises All provisioning happens on-premises (except MFA) Two Trust Modes Key Trust Uses Key-pair for Authentication No Client or User Certificates needed (CA still needed for Server Certificate) Certificate Trust Uses Certificates for Authentication (like Smart Card) Protocol Flow for Key-Trust ADFS 2016 Windows 10 Domain Controller Key Registration MFA Server MFA Authentication MFA Authentication Perform MFA MFA Success MFA Claim Create PIN Create Key Key Registration Check MFA Claim Write Public Key Success Success Protocol Flow for Certificate-Trust ADFS 2016 Windows 10 Domain Controller Certificate RA MFA Server Certificate authority Protocol Flow for Key-Trust (previous slide) Send Certificate Request Check MFA Claim LDAP Request for Public Key LDAP User Public Key Sign Certificate Request With RA Certificate Send Certificate Request Check RA Signature Issue Certificate Send certificate Send certificate Documents updated for Windows Hello [MS-KPP]: Key Provisioning Protocol [MS-OAPX]: OAuth 2.0 Protocol Extensions [MS-OAPXBC]: OAuth 2.0 Protocol Extensions for Broker Clients [MS-OIDCE]: OpenID Connect 1.0 Protocol Extensions Mapping of Documents to Protocol flow MFA Authentication HTTP is used between Windows 10 Client and ADFS 2016 Key Registration MS-KPP Writing Public Key to AD Lightweight Directory Access Protocol Certification Request from Windows 10 to ADFS 2016 OpenID Connect (OAUTH 2.0): MS-OAPX, MS-OAPXBC, MS-OIDCE Authentication For Hybrid Deployment: OpenID Connect when authenticating against Azure AD Kerberos when authenticating against AD For On-Premises Kerberos Documents updated for Authentication [MS-PKCA]: Public Key Cryptography for Initial Authentication (PKINIT) in Kerberos Protocol For Certificate-Trust: The protocol flow is same as Smart Card Authentication For Key-Trust: WS2016 is required. A section for Key-Trust is added in MS-PKCA User sends Public Key in the AS-REQ and Server matches that with one in User object (stored in msDS-KeyMaterial attribute of User object) Thank You! Questions?.

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Supporting Secure Services on Dynamic Aggregation of Heterogeneous Networks
Supporting Secure Services on Dynamic Aggregation of Heterogeneous Networks SUBMITTED TO UNIVERSITY OF SOUTHERN QUEENSLAND IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY David Tai Wai Lai July 2010 Certiﬁcation of Dissertation I certify that the ideas, experimental work, results, analysis, software, and conclusions reported in this dissertation are entirely my own effort, except where otherwise acknowl- edged. I also certify that the work is original and has not been previously submitted for any other award or degree. Signature of Candidate Date Endorsement Signature of Supervisor Date ii I certify that I have read this dissertation and that, in my opin- ion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Dr. Zhongwei Zhang (University of Southern Queensland) I certify that I have read this dissertation and that, in my opin- ion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Dr. Shan Suthaharan (University of Northern Carolina at Greensboro) iii iv Abstract Sharing of services over IP networks prove to be an effective approach to satisfy the demand of network users when their home network cannot offer the required services. Authenti- cation, authorization and revocation are some of the important challenges in the service sharing services over IP networks. This research address the problem associated with the authentication because it becomes more and more complicated due to the incompatible au- thentication schemes used by individual autonomous networks, privacy of authentication information, and the overhead in establishing the sharing.
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Etsi Tr 133 995 V13.0.1 (2017-04)
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State of North Carolina Request for Proposal No
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BIG-IP Access Policy Manager
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AUTHSCAN: Automatic Extraction of Web Authentication Protocols from Implementations∗
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3GPP Report Skeleton
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