1. Planning.

• Assessment
  Start by identifying who needs access, the resources they need access to, and the reason for the access. Review and document the current access rights and ascertain if they can be minimized or altogether eliminated. It may be beneficial to use an entitlement discovery tool for a more comprehensive overview.
• Policy creation
  Draft clear guidelines for both granting and revoking access. Include criteria about who can request access, under what circumstances, and for how long. Particularly for roles with high privileges, establish time-limited permissions.
• Identity source
  Link your JIT access system with an Identity Provider such as Okta, Google Workspace, Azure AD, OneLogin, that will serve as the definitive source of identities. Utilize individual identities instead of shared accounts for enhanced authorization control and precision in audit.

2. Execution.

• Self-initiated access requests
  Simplify proceedings by enabling users to request access directly through the system instead of individuals. Encourage uptake by offering integration with IM platforms like Slack or MS Teams. Ensure requests specify the necessary details such as who is asking for access, the required service/resource/role, the duration of access, and the reasoning behind it.

• Approval procedure
  JIT access offers a chance for companies to delegate approval to individuals more accurately acquainted with the business. Usually, resource owners and division managers have a more comprehensive context compared to IT support teams. Expedite approval responses by leveraging messaging platforms, offering all necessary information for an informed approval.

• Conditional Approval flows
  Incorporate your established policies within workflows that dictate access privileges. Incorporate them into rulesets that determine who can access which resources under what conditions. This could involve creating if-then conditions. For instance, IF identity group “X” requests access to resource “Y”, then it will require approval from "Z" and thereon notify "M".

• Integrations
  Integrating JIT with other IT and security systems will improve flexibility. Create connections with IT ticketing systems to automatically grant access based on the ticket status. Similarly, link with data classification systems to modify policies depending on data sensitivity. Ideally, tagging resources and grouping them under different categories should streamline this operation. Associate with on-call scheduling applications for automated approvals during emergencies.
• Automated Provisioning and Deprovisioning
  A deep understanding of COR is key for effectively granting and revoking fine-grained access automatically within the service. For JIT Access, this is crucial as it significantly reduces reliance on human interference, allowing for automated removal of access which aligns with the principle of least privilege access (POLP). Preferably, manage all permissions centrally to avoid setting up separate environments for each separate application within your organization.
• Access methods
  For COR JIT Access, APIs are favored because of their flexibility and immediacy. You may need to employ a blend of methods, for instance, using SAML for authentication, SCIM for user provisioning, and APIs for granular access control

3. Maintenance.

• Regular Audits
  Check access logs periodically to confirm JIT access is functioning as expected. Monitor any unusual patterns or behaviors either directly or by feeding the logs into your SIEM. The user access review can be automated to hasten evidence gathering, delegate reviewers, and ensure compliance with necessary regulations or standards.
• User training
  Users, particularly those with high privileged roles, should be educated about JIT Access, its functionality and the principle of least privilege. Users should know how to request access as required.
• Feedback
  Regularly review your JIT access processes and seek feedback from the users and IT teams to pinpoint areas needing improvement.

This systematic approach will enable efficient deployment of a robust Just-in-Time Access system for COR.