Central Authentication and Directory Service (CADS)

The central authentication infrastructure built by ITSC provides a unified, secure and integrated method for verifying the electronic identity of all persons in the university community. It is an essential IT security enabler for campus-wide services, systems and applications.

By possession of a CUHK Staff or Student ID/Computing ID/Email Address, a student or staff, is not implicitly, granted an access to information or services. Their eligibility of an access right to information or services depends on their role or status (staff/retiree, student/alumni) with the University. Unit heads, or their service owners, are responsible for establishing the access policies for their services. They have to decide the access policies before applying for the Central Authentication and Directory Service supported by the central authentication infrastructure of ITSC.

Use of CUHK Staff or Student ID/Email Address and their OnePass password for authentication are strictly prohibited without prior application to ITSC. ITSC would approve application for CADS only if the IT System owner can compile to the guidelines as specified in tab 4 CADS Application Procedures and Guidelines here. ITSC will terminate the system from the use of CADS at anytime if ITSC finds any violation to terms in this policy document.

A. Responsibility of an Individual

1. Any person who is issued a CUHK computing account must read and agree to a set of responsibilities set forth in Computer Network – Policies & Guidelines on Access and Usage in particular.

2. Many online applications now require one’s OnePass password for authentication. In order to protect one’s interests, one should observe the guidelines for setting a strong password.
3. If users have discovered that there are vulnerabilities in accessing any one of authorized information systems, they should inform the ITSC. The ITSC will work with the concerned information system owner to implement remedy solutions. If the information system owner refuses to implement remedy solutions, the ITSC has the right to stop the computer account access from the responsible information system.
4. Should one suspects that his or her password has been compromised, he or she should change it immediately online at http://cai.itsc.cuhk.edu.hk/chgpwd and report the incident as documented.

B. Responsibility of ITSC

1. As the owner of the CUHK computing accounts, the ITSC will act with prudence, diligence and due care to protect the data.
2. Unauthorized access, collection, disclosure, modification or processing of the computer account information will be forbidden or blocked by ITSC without prior notice.

C. Responsibility of IT System Owner

To use the Central Authentication and Directory Service (CADS), the IT System Owner is responsible for:

1. Making sure that basic security measures have been implemented in their information systems that are going to connect to CADS.
2. Providing basic security measures include, but not limited to, the following settings: encrypt all data transmitted between the information system and CADS system, control the number of password trials, forbid any forms of password storage even temporarily, etc. More suggestions on security measures could be located in Information Security Best Practices.
3. Allowing the ITSC to enlist information of their information systems in CADS-registered IT systems (via  Campus Network / CUHK VPN).
4. Informing the authorized users of their system that the use of their computer account information for authentication has been authorized by the ITSC.
5. Complying to The Personal Data (Privacy) Ordinance and IT Security Policy for Application Systems on Personal Data Handling when handling user data. Personal Information Collection (PIC) Statements must be published at an eye-catching area of the information system notifying the users the purpose(s) of collecting and using their computer account information.
6. Maintaining a channel for their users for enquiring their policies on using personal data. A link to ITSC Service Desk (http://servicedesk.itsc.cuhk.edu.hk) for users to report any improper use of the University computing account information must be placed at the information system.
7. Using the user authentication mechanism provided by ITSC on the designated IT System only.
8. Using OnePass as the IT System landing page for OnePass enabled applications.
9. Enforcing authorization on the IT system as CADS is for authentication or passing some attributes.
10. Informing ITSC about the change of their IP address.
11. Regarding systems or mobile apps developed by outsourcing vendors.
    1. The departments/colleges/faculties should get the source code especially corresponding coding for authentication.
    2. The systems or mobile apps must subsequently maintain by a full-time CUHK IT staff.
    3. A Non-Disclosure Agreement (NDA) policy has been set and a NDA form must be signed.

1. Application to the use of CADS shall be submitted by the IT System Owner. The IT System Owner shall complete the CADS application form and submit it to ITSC
   • at the planning stage of the information system development; and
   • at least one month in advance before the production date of the system
2. A CADS application must be endorsed by Department / Unit Head and is subject to annual renewal.
3. On applying the service, the IT System Owner must be responsible for its system security and take the responsibility as specified in Part C of tab 3. Responsibility here.
4. CADS will only serve systems that are connected to the campus network.
5. The IT system must have strong physical security protection where access is limited to authorized personnel. ITSC may conduct onsite checking on the compliance of physical security.
6. The IT system enabled with secure web communication (https) must be installed with a digital certificate which is default entrusted by popular Internet browsers including IE, Firefox, Safari, etc.
7. Administration of the IT system must be performed by a qualified or a dedicated IT staff.
8. The IT System will be reviewed by ITSC and have to pass the ITSC Vulnerability Assessment Test.
9. For any IT systems which will handle personal data, they must comply with IT Security Policy for Application Systems on Personal Data Handling and the system owner must have the endorsement from the related data steward(s).
10. The System Owner must provide ITSC with proper system documentation.
11. The System Owner should follow the guidelines as set for OnePass Login Integration (CUHK Login via ADFS)
12. After the CADS is approved by ITSC, the System Owner are encouraged to include the following on its web page.
    1. CADS logo:
       
    2. CADS reference number (via CUHK VPN / campus network)
    3. the message “This is a CADS-registered IT System. It passed the application procedures published at https://www.itsc.cuhk.edu.hk/all-it/information-security/centralized-authentication-and-directory-service and was approved by ITSC.”.
    4. For mobile apps
       • ITSC will publish passed assessment Mobile Apps to corresponding Apps Store with Publisher ID “The Chinese University of Hong Kong”.
         iOS : Apple Apps Stores
         Android : Google Play
       • (Advisory) For Mobile Apps development, a webpage should be created to list out supported Mobile platforms and shown proper installation steps for each mobile platform in order to get user awareness not to download phishing Apps from unknown Apps stores.