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Identity Management Standardization in the cloud computing
1. 3rd SG13 Regional Workshop for Africa on โITU-T
Standardization Challenges for Developing Countries
Working for a Connected Africaโ
(Livingstone, Zambia, 23-24 February 2015)
IDENTITY MANAGEMENT
STANDARDIZATION IN THE CLOUD
COMPUTING
MOUNIR FERJANI
Product Manager, Huawei Technologies
mounir.ferjani@huawei.com
2. AGENDA
โข Access Control
โข Identity paradigm
โข Cloud identity management Scenarios
โข Use Cases and Challenges for identity
standardization
โข SCIM core Schema
โข SCIM Protocols
โข Shortcomings
3. Access control
โข Access control is concerned with determining
the allowed activities of legitimate users,
mediating every attempt by a user to access a
resource in the system.
NIST 7316
4. RBAC
โข Role-based policies require the identification of roles in the system.
A role is a collection of permissions to use resources appropriate to
a person's job function
โข Least privilege : ensure users have access to only the resources they
need
โข automate access certification processes from start to finish to meet
ongoing compliance requirements
โ Policies : separation-of-duties
Developer
Budget
Manager
Help Desk
Representative
Director
7. Identity
The first concept of
identity is a set of
identifiers or attributes.
NIST sp800-103-draft
ID for online
banking
ID to request
certificates
ID to purchase
flights
ID for online
magazines
E-Commerce
ID
ID for social
network
Identifiers
Unique
Identity
(ID)
Attributes Secret
10. SAML Assertions
Assertion ID
Issue Instant
Issuer
Subject
Asserted Attributes
Not Before
Not After
Subject (user identity)
Authentication instant
Authentication
mechanism
Digital Signature
11. Identity Management
โข Directory services :
โ AD, LDAP, RADIUS
โข Identity providers
โ PKI
โ SAML : exchange ID via web XML
โข OpenID
โ RP : Relying parties
โข WS security : SOAP extension
โข Oauth
13. Cloud computing
โข Paradigm for enabling network access to a scalable
and elastic pool of shareable physical or virtual
resources with self-service provisioning and
administration on-demand
โ NOTE โ Examples of resources include servers, operating
systems, networks, software, applications, and storage
equipment.
โข ISO/IEC 17788 | Recommendation ITU-T Y.3500
13
15. Cloud User Ownership change (1)
โข CSP has a multitenant cloud platform
โข User 1 and user 2 belong to enterprise
โข Enterprise is tenant
โข Enterprise is customer of CSP
โข User1 and user 2 are entitled with different identities to access
subjects (files)
โข If user 1 leaves enterprise, enterprise will ask CSP to change identity
ownership to user 2
16. Cloud User Ownership change (2)
โข Requirements :
โ Secure communication protocols between tenant
and CSPs
โ CSP can enforce identity change
โ Secure log of all identity change availabe for
auditing
17. Migration of the identities
โข Enterprise is customer of CSP1 and has app 1
managing identity information.
โข Enterprise becomes customer of CSP2 and has
app 2 managing identity information.
โข Applications and CSP providers support the same
identity format& protocol standard
โ Format of identity
โ Protocol for managing identities
18. Identity federation between cloud
providers
โข User has an account with application hosted by a CSP1.
โข User requests a service from an application running on
CSP2 relying on user's authentication by CSP1 and
using identity information provided by CSP1
โข Trust model establishment between CSPs :
โ How to securely provide identity information (protocol)
โ How to verify received identity information
โ How to process the identity information received
19. Simple Cloud Identity Management
โข SCIM group : System for Cross-domain Identity
Management
โ Standardize methods for creating, reading, searching,
modifying, and deleting user identities and identity-
related objects across administrative domains, with
the goal of simplifying common tasks related to user
identity management in services and applications.
โ SCIM 1.0.
โ Protocol : draft-ietf-scim-api-15
โ Schema : draft-ietf-scim-core-schema-15
20. Schema
โข SCIM schema provides a minimal core schema for
representing users and groups (resources)
โข Resource is a collection of attributes identified by one
or more schemas.
โข Minimally, an attribute consists of the attribute name
and at least one simple or complex value either of
which may be multi- valued.
โข For each attribute, SCIM schema defines the data type,
plurality, mutability, and other distinguishing features
of an attribute.
27. SCIM protocol API
โข REST API
โ Create Resource
โ Retrieving Resources
โ Modifying Resources
โ Deleting Resources
28. Identity synchronization
โข CSPs need to integrate with existing systems :
โ Billing
โ Accounting
โ Contract Management
โข Identity formats
โข Format exchange protocol
29. Cloud Resources provisioning
โข Cloud service automatic provisioning
โข Workflows definition
โ Automation layer manage provisioning engines
โ Provisioning engines act on resources using APIs
โข The need to Protection Profile for Hypervisor APIs
โ Identity of objects belonging to orchestration
โ Protocol for exchange
30. Cloud Resources de-provisioning
lifecycle
โข Automatic Cloud service de-provisioning
โ User
โ Due to contract stopping for postpaid modes
โ Due to end of validity period
โข Freeze and delete
โข Internal : from orchestration linked to time servers
โข Auto de-provisioning request :
โ Identity of time servers
โ Identity of external systems (billing, โฆ)
โ Identity of objects inside de-provisioning engine
31. Summary
โข Need for :
โ Open standards for identity and access management in the
cloud
โ Identity interoperability
โ Identity orchestration
โข Shortcomings of SCIM :
โ Do not specify identity for resource pools APIs : like Hypervisor
APIs (vdisk APIs, storage APIs, VM provision APIs, SaaS APIsโฆ)
โ Do not define identity for Broker APIs
โ Do not define authentication mechanisms : the choice of
authentication mechanism will impact interoperability
32. Proposals to ITU
โข Define a digital identity framework for the
cloud computing
โ Format, Protocols, APIs, secure digital identity,
interoperable digital identity
โข Define minimum security requirements for the
cloud identity service (PKI, relying or third
parties,โฆ)