May 6, 2011, 7:57 p.m.
posted by sussel
On the Job
Your security concerns with an employee should not stop after that person is hired.
1 Initial Training
Every potential computer user should undergo fundamental education in security policy as a matter of course. At the least, this education should include procedures for password selection and use, physical access to computers and networks (who is authorized to connect equipment, and how), backup procedures, dial-in policies, and policies for divulging information over the telephone. Executives should not be excluded from these classes because of their status—they are as likely (or more likely) as other personnel to pick poor passwords and commit other errors. They, too, must demonstrate their commitment to security: security consciousness flows from the top down, not the other way.
Education should include written materials and a copy of the computer-use policy. The education should include discussion of appropriate and inappropriate use of the computers and networks, personal use of computing equipment (during and after hours), policies on ownership and use of electronic mail, and policies on import and export of software and data. Penalties for violations of these policies should also be detailed.
All users should sign a form acknowledging the receipt of this information, and their acceptance of its restrictions. These forms should be retained. Later, if any question arises as to whether the employee was given prior warning about what was allowed, there will be proof.
2 Ongoing Training and Awareness
Periodically, users should be presented with refresher information about security and appropriate use of the computers. This retraining is an opportunity to explain good practice, remind users of current threats and their consequences, and provide a forum to air questions and concerns.
Your staff should also be given adequate opportunities for ongoing training. This training should include support to attend professional conferences and seminars, subscribe to professional and trade periodicals, and obtain reference books and other training materials. Your staff must also be given sufficient time to make use of the material, and positive incentives to master it.
Coupled with periodic education, you may wish to employ various methods of continuing awareness. These methods could include putting up posters or notices about good practice, having periodic messages of the day with tips and reminders, having an "Awareness Day" every few months, or having other events to keep security from fading into the background.
Of course, the nature of your organization, the level of threat and possible loss, and the size and nature of your user population should all be factored into your plans. The cost of awareness activities should also be considered and budgeted in advance.
3 Performance Reviews and Monitoring
The performance of your staff should be reviewed periodically. In particular, the staff should be given credit and rewarded for professional growth and good practice. At the same time, problems should be identified and addressed in a constructive manner. You must encourage staff members to increase their abilities and enhance their understanding.
You should also avoid creating situations in which staff members feel overworked, underappreciated, or ignored. Creating such a working environment can lead to carelessness and a lack of interest in protecting the interests of the organization. The staff could also leave for better opportunities. Or worse, the staff could become involved in acts of disruption as a matter of revenge. Overtime must be an exception and not the rule, and all employees—especially those in critical positions—must be given adequate holiday and vacation time. Overworked, chronically tired employees are more likely to make mistakes, overlook problems, and become emotionally fragile. They also tend to suffer stress in their personal lives—families and loved ones might like to see them occasionally. Overstressed, overworked employees are likely to become disgruntled, and that does not advance the cause of good security.
In general, users with privileges should be monitored for signs of excessive stress, personal problems, or other indications of difficulties. Identifying such problems and providing help, where possible, is at the very least humane. Such practice is also a way to preserve valuable resources: the users themselves, and the resources to which they have access.
A user under considerable financial or personal stress might spontaneously take some action that he would never consider in more normal situations—and that action might be damaging to your operations, to your personnel, and to the employee himself. When we read in the newspaper about someone who goes on a shooting spree in the office, who cleans out the corporate bank account, or who commits suicide, the coworkers almost always comment about how they knew he was stressed or acting funny. Too bad they didn't act to help head it off.
Managers should watch for employees who are obviously stressed; have trouble interacting with some other workers, customers, or vendors; have financial or health problems; have repeated problems with inappropriate use of computing resources (e.g., they are drawn to porn or gambling sites); or have other obvious troubles. Guiding them to counseling is a compassionate and humane thing to do, even if the behavior is severe enough to warrant termination. Most communities have low-cost or free services if other services are not covered under your company's benefits plan.
4 Auditing Access
Ensure that auditing of access to equipment and data is enabled, and is monitored. Furthermore, ensure that anyone with such access knows that auditing is enabled. Many instances of computer abuse are spontaneous in nature. If a possible malefactor knows that the activity and access are logged, he might be discouraged in his actions.
Audit is not only done via the computer. Logs of people entering and leaving the building, electronic lock audit trails, and closed-circuit TV tapes all provide some accountability.
At the same time, we caution against routine, surreptitious monitoring. People do not like the idea that they might not be trusted and could be covertly watched. If they discover that they are, in fact, being watched, they may become very angry and may even take extreme action. In some venues, labor laws and employment contracts can result in the employer's facing large civil judgments.
Simply notifying employees they are being monitored is not sufficient if the monitoring is too comprehensive. Some studies have shown that employees actually misbehave more and are less productive when they are monitored too extensively. This is true whether you are monitoring how often they take coffee breaks, timing every phone call, or keeping a record of every web site visited.
The best policies are those that are formulated with the input of the employees themselves, and with personnel from your human resources department (if you have one).
5 Least Privilege and Separation of Duties
Consider carefully the time-tested principles of least privilege and separation of duties. These should be employed wherever practical in your operations.