Despite taking a beating in the press and from customers for security holes in its products, decision makers at Microsoft appear to think the company still has something to teach the world about computer security.

The software giant this week published a technical white paper that describes its internal security practices, which Microsoft hopes will "help customers successfully secure their environments," the company said.

The paper, simply titled Security at Microsoft, details the methods and technologies that the company's Operations and Technology Group (OTG) use to secure the company's global corporate network of more than 300,000 computers and 4,200 servers.

In the paper, Microsoft describes its risk management strategy, which involves classifying different computing resources according to their "value class" -- from servers hosting the Windows source code down to test servers. Microsoft also provides guidance on how its security group assesses the potential risks and threats to those assets and creates policies to secure the assets that are appropriate, given the value of the data they contain.

Just as interesting are the tidbits of information about Microsoft's security operation that can be gleaned from the document. For example, Microsoft discloses that the company experiences more than 100,000 intrusion attempts each month and receives more than 125,000 infected e-mail messages.

To protect corporate assets from threats introduced by remote workers, Microsoft said it has invested heavily in smart card technology, deploying more than 65,000 smart cards to remote workers that enable them to log on to the corporate network using two-factor authentication.

The company is also candid in admitting to past security failures, acknowledging that the company has been attacked in the past and that "there is a medium to high probability that within the next year, a successful attack will occur that could compromise the High Value and/or Highest Value data class," such as source code or human resources data, according to the document.

Microsoft also says that prior to reforms enacted by the OTG in recent years, the company had no formal, enterprise-wide system for managing its source code. Instead, Microsoft's source code management was characterized by "redundant infrastructure and inconsistent processes," as well as inadequate security, according to the document, Microsoft said. At one point, any computer on the company's network could access the Source Depot servers storing the company's source code, creating a situation in which "the compromise of a single computer on the corporate network could potentially lead to penetration of one or more Source Depot servers," according to the document.

The IDG News Service is a Network World affiliate.