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4.1.1 Supporting a distributed heterogeneous application architecture with a homogeneous distributed security infrastructure leveraged across the enterprise; providing user and service identities and propagation; and providing a common, consistent security authorization and access control infrastructure.

4.1.2 Providing mechanisms to describe and enforce enterprise security policy systematically throughout the organization for consistency, maintenance, and ease of modification and to demonstrate compliance to applicable regulation and law.

4.1.3 Providing support for distributed/service-oriented architectures in which enterprise-wide services and authoritative sources are protected by providing security services that themselves are also distributed using common interfaces and communication protocols.

4.1.4 Providing “economies of scale” where it is desired to change the approach of individually managing the configuration of each point of enforcement to one that establishes a consolidated view of the safeguards in effect throughout the enterprise.

4.1.5 Providing centralized control, management, and visibility to security policy across the enterprise and when connecting to other organizations. This allows for additional key features such as delegated administration, centralized policy analysis, and consolidated reporting.

4.1.6 Providing a distributed computing security architecture allowing for synchronized security services that are efficiently maintained across the enterprise while also allowing for centralized policy control and distributed policy decision-making/enforcement. Ensuring proper security controls are enacted for each service and when used in combination.

4.1.7 Provisioning incremental updates to policy and configuration data simultaneously across all distributed decision/enforcement points. Establishing and enforcing new policies not envisioned when individual applications were fielded and adapting to new requirements and threats. Managing identity and security implemented in a diverse mix of new and old technologies.

4.1.8 Permitting an organization to grant, suspend, or revoke centrally any or all ability to connect to or access enterprise resources either individually or collectively and with the capability to enforce these policies at run-time.

4.1.9 Supporting access decisions that are sensitive to a user’s credentials in addition to identity. For example, the user may have to be a licensed healthcare professional to access a medical record.

4.1.10 Supporting Delegation—A user might delegate access for a resource to another user (for example, a physician might delegate access to his patient’s records to a specialist). This shows the need for a delegation capability for some applications.

4.1.11 Supporting Sender Verification—When a user receives a signed document, he shall be sure the sender was, in some sense, authorized to sign and send the document. A simple example would be a prescription that shall be signed by a doctor. A simple identity certificate is insufficient, as it does not indicate the sender’s credentials (that is, that he is a doctor).

4.1.12 Supporting Document Cosigning—Multiple examples exist in which more than one signature is required on a document (2). For example, a transcriptionist transcribes and signs a document, but it is not a valid part of the record until it is reviewed and signed by the primary care physician. Similar mechanisms can be used to provide cosignature controls when processing claims transactions. These types of applications require the ability to convey user authorizations (in assertions, credentials, authorization certificates, or possibly as extensions in identity certificates), to label documents and other objects with their security attributes (or to extract such attributes from the document), and to express authorization rules in machine-readable form.

4.2.1 Privileges needed to access a target are conveyed in a claimant’s authorization credential. The claimant’s authorization credential may be an authorization certificate compliant with ISO 9594-8 (a particular form of attribute certificate) or a policy set description compliant with XACML or other referenced authorization standards.

4.2.2 The sensitivity or other properties of the target being accessed may be held in a local database or in a signed data structure. This guide does not define a standard way to represent this information, since this is a local matter. It does provide guidance on how such information might be represented and manipulated using common mechanisms such as ASN.1 and XML. For a given target object, there may be multiple operations that may be performed; each such operation may have a different set of sensitivity attributes.

4.2.3 The privilege policy may be held centrally, locally, or may be conveyed as a signed data structure. Different operations on a target may be subject to different privilege policies. This guide defines several standard policies, and applications may define additional policies.

4.2.4 In the document authorization paradigm, cosignature requirements may be associated with a user or document, such that the signed document is considered authorized only if all necessary signatures are attached.

4.2.5 Users may delegate privileges to other users.

4.2.6 Users may be assigned to roles that convey permissions.

4.2.7 Some authorizations may be sufficiently dynamic that it is not feasible to place them in an enterprise authorization infrastructure (that is, the cost of maintenance is too high given the short lifetime or rapid frequency of change of the privileges or constraints). Such authorizations may be kept in a local authorization server’s database and accessed as environmental variables.