Both of these solution sets have their pros and cons and some vendors attempt to convince potential customers that their solutions will solve all of their problems in the area of information and data leakage. The fact of the matter is that the majority of these solutions, when deployed as a single solution, provide only partial protection against loss or disclosure of data or information. Other vendors make the caveat that their solutions only provide protection against the inadvertent or accidental loss or disclosure of data or information. These solutions make no specific claim to guard against deliberate loss or disclosure of data and information.
It is important that security practitioners not be lulled into a false sense of security if one of these solutions is deployed and advertised within an organization as the "Silver Bullet" of information and data protection.
These two seemingly competing technologies have some striking similarities to another set of technologies that came to the forefront of the security industry a few years ago. In the early part of the decade, Intrusion Detection Systems (IDS) started to mature and move towards mainstream acceptance and adoption by the security community at large. Not long after that Intrusion Prevention Systems (IPS) were introduced and presented by many as the logical evolution of IDS. Not long after the introduction of IPS, there were proclamations by many information security pundits that IDS was dead, long live IPS! The evolution of the technology has for the most part played out and in the final analysis there is a place in the enterprise for both technologies.
Recently, although on a somewhat smaller scale, a similar proclamation was made regarding DLP technology solutions. Once DLP and DRM technologies are examined, it becomes apparent that there is a place in any enterprise that requires comprehensive monitoring and enforcement of its data classification policies to protect its data and information from improper use.
Going back to the analogy that was drawn between these technologies and the IDS/IPS technologies, it became apparent that you use IPS technologies where you new what you wanted to block and were very certain that only specific inappropriate traffic was going to be affected. In areas where that certainty was not there, it became apparent that you use IDS technologies to monitor, alert, respond and institute change in the environment to eliminate unwanted traffic as it was identified.
Similarly the same approach can be used with regard to DRM and DLP technologies being deployed in the enterprise. A DRM solution can be deployed for information that has been properly classified and is resident in known information stores. Once subject to an enterprise policy of a DRM solution, that information is protected during its lifecycle and can be retired at the proper time based on an organizations retention policy, or when there is suspicion of inappropriate use of that information.
For information that has not been classified and/or is not residing in known information stores, a DLP solution can be employed. As critical content is detected by the DLP solution it can then be properly classified, moved to the appropriate information store and become subject to enterprise DRM policy and governance.
The last element of any information and data protection program is to employ encryption on any and all high risk devices in the enterprise. This typically means laptops and mobile devices. It is important to identify all types of information that exists in the enterprise that may not be subject to the DRM solution or by its nature not be detectable by the DLP solution at some point in its life cycle.
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