For example, a policy may say that those in the financial department can share their spreadsheets with others in the same department but no one else. To enforce such a policy means that data in transit needs to be checked to see who is sending spreadsheets to whom, that on their PCs accountants must be prevented from copying spreadsheets to USB memory sticks and sending them to printers, and that such spreadsheets should only be stored in encrypted format-this requires one simple policy that can be enforced through technology, but probably only be defining it in three places.
Organisations can identify their users by getting them to authenticate against directories. User directories are generally accessed via a standard called LDAP (lightweight directory access protocol), and most security tools link to such directories to understand who users are and what groups they belong to. A well organised IT department may have just one user directory. But when it comes to policy, it usually needs to be defined time and again as there are no real standards and few generic repositories for policy that can be shared by multiple security tools.
IBM's initiatives this year around data security underline the problem. IBM can enforce encryption by defining policies in Tivoli Storage Manager, but to boost its offerings it has formed two new partnerships: Verdasys for the management of end points and Fidelis Security Systems for monitoring data in use. The problem is that both the new partners' products have policy engines too-so three in total; plenty of scope for duplication and inconsistency.
IBM is not alone. Other security vendors have addressed data security through multiple product lines developed in-house, acquired or via partnership. For example Symantec bought Sygate for end point security (now Symantec End Point Protection or SEP V11) and Vontu for data leak prevention or DLP (now Symantec DLP V9), both of which had their own policy engines.
CA, EMC/RSA, Trend Micro and Websense have all made acquisitions in the DLP and end point areas and face similar problems with co-ordinating policy. McAfee has one of the most centralised approaches. Its ePolicy Orchestrator (ePO) was developed in-house and is core to its security suite. All its acquired technology is integrated with ePO as well as with 50-plus partner products, all done using McAfee's own proprietary software development kit-so still not standards based. Meanwhile Microsoft has made some moves in this direction with the beta release of its new security management tools code named "Stirling".
Well defined and managed policy is essential to achieving and being seen to achieve good security practice. The industry needs a more co-ordinated approach on how policy is defined and shared across multiple products; it is possible for the management of people's identities through the use of directories and there are standards for access to these-what is needed now is to make it easier to find out what they are allowed to do.
