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1610 PR.01 Systems and Network Security
June 10, 2011
This document provides general procedures for securing a computing device used for Yale business whether located on Yale owned premises or elsewhere. The procedures are strongly recommended for all computing devices whether connected to a network or not. For some uses, the procedures are mandatory (see below). The methods actually used to implement the procedures as well as additional, more stringent, procedures will vary with specific location and will be detailed by local support providers.
The mandatory IT security requirements for faculty, students, staff, trainees, and others in Yale’s HIPAA Covered Components are described in HIPAA Security Policy 5100. The procedures outlined below do not apply to these individuals. Instead, all faculty, students, staff, trainees, and others in Yale’s HIPAA Covered Components must refer to HIPAA Security Policy 5100 for more information.
Note that the following 15 procedures apply to every individual who uses a computing device for University business. However, procedures 8-15 are technical in nature and may be delegated to a responsible IT support professional.
Some of the technical provisions may be impracticable for computers not connected to a network. However, even in that situation, the procedures should be implemented to the extent possible, especially if there is any possibility that the device may be connected to a network in the future.
All individuals who use Yale University computing and networking facilities are required to read and abide by Yale’s Information Technology (IT) Appropriate Use Policy 1607 and other relevant policies.
The Information Technology Acceptable Use Policy (ITAUP) is the overarching policy governing the use of computing technology at the university. Among critical provisions, the ITAUP prohibits sharing of accounts and passwords unless specifically authorized. The ITAUP also prohibits obtaining unauthorized access to IT systems or permitting others to do so.
Links: Policy 1607 ITAUP||
All faculty, staff, and students on campus have access to IT support staff. Know who they are and the services they provide before you need them. IT support staff (Help Desks and Technicians) are trained in routine information security support and Yale’s IT web sites have comprehensive information on security.
Yale has assigned IT Security Officials who are responsible for oversight of the IT security policies and procedures and who can be contacted regarding possible IT security incidents. If you have any questions about general IT security information, you should contact one of the Information Security Office staff.
If you believe sensitive data may have been compromised, you must notify Information Security Office (ISO) at either the central (ISO). You must also promptly notify your immediate supervisor and administrative unit head if any Yale University physical or information asset is damaged.
Information security compromise of a system often results in a dramatic change in your own computer’s performance that can be observed by the user. If you notice your personal computer rebooting by itself, suddenly slowing dramatically or exhibiting any unusual behavior, seek assistance from your IT support provider to determine if your computer may have been compromised
· Keep your passwords private. Do not share them with anyone including your supervisor, family, co-workers, or IT support provider.
· Change any weak default passwords for local applications (e.g., Meeting Maker, Tivoli backup, BMS etc.) , so that they employ strong passwords
· Change your passwords periodically. A list of password change utilities is available on-line (including changing NetID passwords).
· If your password is discovered or you determine that someone is using it to access your account, contact Information Security at either office: ISO.
Information displayed on your computer screen can be viewed casually by anyone within view. If you leave the area and sensitive data is visible on the screen of your computer, such information can readily be viewed by anyone nearby who chooses to look. Use a screensaver that hides the screen after 10 minutes of inactivity and requires a password to restore the display. When you are away from your computer for extended periods, secure the space, if possible, since physical access to your computer allows other methods of access to your data (e.g. inserting a disk or CD with tools for “hacking”).
Consider whether sensitive information displayed on your desktop can be seen by others; make sure to position your computer screen out of view by anyone who has no need to view it. In public areas use privacy screens to hide sensitive information or use a locking screen saver to protect your computer when you are away from your desk. Automatic time-outs for computer sessions will help protect sensitive information.
Never leave portable computing devices unattended and unlocked. Make sure the access to data on the device and the access to the device itself is limited. Portable devices such as PDAs, USB memory sticks and laptops are all especially vulnerable in transit. They can be lost or stolen on your way to or from Yale. Good protective measures include putting them in a locked briefcase or cabinet or using password protection or encryption.
If you see someone in your area and you are uncertain if they have legitimate business to be there, either either engage them to provide appropriate help or contact the Yale Security Department.
Yale business locations outside New Haven must abide by appropriate security policies which meet the same standards.
When using a web browser, be aware that the less you know about a site, the greater the dangers. For secure sites (sites whose address begins with “https” instead of “http”) examine the web address carefully to assure it is as expected. Always examine embedded links to see that they point to an address consistent with what you expect. If any question, type in the expected address manually rather than follow a programmed link.
Be very careful when installing any program on your computer. Many programs that can be downloaded from the Web automatically install spyware or other malicious software (“malware”) on your computer. Only download software from Yale servers or well-known software vendors (Apple/Microsoft/ Netscape/Symantec). Use Yale’s standard electronic procurement links to access University-approved vendors. If a link does not exist to a vendor from a Yale site, check with the Procurement Office before making an alternate Web-based purchase.
Electronic messages (e.g., email) or transactions containing sensitive or proprietary information about the University, faculty, staff, students, patients or others must be safeguarded to ensure the confidentiality and security of such information. For more information: Secure Computing.
The following widely-used Internet programs represent significant potential security risks and are prohibited on any Yale computers with sensitive data:
· Peer-to-peer file sharing services such as Gnutella, Kazaa, Bittorrent, eDonkey and the like unless a particular application is specifically approved for Yale business (as identified in an official Yale software download site) or an exception is granted via the ISO; many of these programs open a direct route to your computer which may be used by others for direct access and many of these programs may directly share files on your computer to the Internet;
· Video games, particularly any that might be downloaded from the Internet;
· Shareware utilities such as so called “Internet Accelerators.”
In addition to the concerns listed above, many of these programs are packaged for download with spyware or dangerous malware which may seriously compromise your computers’ security.
Some programs, such as Instant Messenger, WeatherBug and other useful and apparently benign software can also pose risks. As with peer-to-peer, Yale prohibits the use of these programs on machines containing sensitive information unless specifically approved (as identified on an official Yale software download site) or an exception is granted via the ISO.
In general, you should seek ISO advice if you wish to run any program on a machine containing sensitive data which has not already been approved for such use at Yale.
Link: Secure Computing.
Use only official University email systems for Yale business related email.
When using email, don’t open attachments unless you are expecting them and check any embedded links within emails to verify they point to the expected location.
The single greatest cause of email exposure of sensitive data is sending email to the wrong recipient so carefully check all addresses before sending.
Configure your email software to use secure protocols (e.g., “TLS/SSL” for both sending and reading email using email clients such as Eudora, Thunderbird and Outlook – your IT support provider can configure this option) at all the locations from which you use email. Use SPAM and virus filters provided by University email servers:
Install the University provided anti-virus and anti-spyware tools and keep them up to date. Anti-virus and anti-spyware software is available at no fee to all Yale faculty, staff and students.
File Sharing means you are allowing access to drives/directories/files on your local hard drive..File sharing should be disabled or restricted and secured.
ITS provides a Secure File Transfer Facility. The File Transfer Facility is located at http://www.yale.edu/its/email/transfer.html
Any “electronic data interchange” between Yale and vendors must be only via links with equal or better security to that of a Virtual Private Network (VPN) connection.
Keeping current with updates and patches provides an added layer of security. Your IT support organization can provide automated solutions to keep software up-to-date.
NOTE: Consult you local IT support person if you are concerned that any update might affect the ability to access a University application (i.e., Oracle, IDX).
So that if something happens to your computer, files and data will be recoverable. Centrally managed back-up services are available.
Many people assume deleting files totally removes the data. In fact, it does not and apparently deleted information can still be accessed by technically savvy people. If you have a device (including PC hard drives, CDs, Diskettes, USB keys, PDA’s) containing sensitive data that requires disposal, reuse or donation, you must have all such sensitive data completely removed via such techniques as zeroing or degaussing or physically smashing the device. Contact your IT support staff, who can provide guidance on the necessary steps. For more information, please review Procedure 1610 PR.2 Disposal of Obsolete Computers and Peripherals.
Access to sensitive data must be limited to those users with a legitimate business need to access the information. Appropriate safeguards must be in place to prevent unauthorized exposure of sensitive information to anyone, including family members, friends, and others.
Use encryption technology (e.g. VPN and SSL) when accessing Yale systems remotely or over wireless networks.
VPN Links: ITS
Never employ call forwarding on remote modem lines to gain access to systems with sensitive data which employ call-back user-authentication.
Wireless devices (including laptops, smartphones and PDA’s) must be configured to minimize the ability of unauthorized individuals to gain access to University resources or to monitor data communications. Wireless networks inherently provide a lower level of security than wired networks, making them problematic when handling sensitive data. Clients should ensure their computing device is securely configured and if the computing device contains sensitive data you should always enable a Yale VPN connection before making a wireless connection to the network.
Portable devices add another dimension to the problem of information security. Always protect a portable device with a password and configure the device to shut down (or lock in some other way) after a period of inactivity. That way, if the device is mislaid or stolen, access to the data will be made more difficult. If possible, encrypt any sensitive data that is stored on your portable device or media such as a “USB key” that you may use. Doing this may require technical expertise, please obtain assistance if needed.