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The following case studies illustrate various ways in which security can be improperly implemented. Each example is based on an actual account of a real corporation, although the names have not been used. In general, these real-word examples demonstrate that security breaches often focus on four areas: data at rest, data in transit, authentication, and improper implementation. It is staggering how often these four elements are involved in security lapses. By examining these cases in depth, we hope to prevent these types of incidents from reoccurring.
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Many Web sites are still providing communications in the clear (i.e., not encrypted). As a result, they make themselves vulnerable to attackers using sniffers, who monitor and intercept clear traffic for their own purposes. Worst yet, officials in many corporate enterprises feel that their data is safe as long as it remains within their firewalls. The problem is that with many employees within the same local area network, it is easy
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for an employee with sinister intentions to view, destroy, or simply manipulate all the data traveling up and down the lines. For example, one software vendor that recently joined the ranks of the dot-com world allowed for the unsecured transfer of data between its internal servers. This meant that account numbers and cardholder information flowed across their internal network completely visible to any employee. This corporation, like many other corporations, felt that as long as security was provided for information flowing across the Internet, there was no need to enable internal security (behind their corporate firewall). This particular corporation found out the hard way that there was need for internal security. It turned out an employee had been saving customer credit card numbers as they zoomed across their internal network. When asked why, the employee simply stated that he could. What if the employee had posted the credit card numbers on the Internet (for the world to see) If the press had gotten hold of that story, the corporation would have most likely lost many customers. What if the employee had used the credit card numbers to make purchases for himself The credit card corporations involved might have lost faith in the merchant and cancelled their contracts. Fortunately, the corporation discovered the employee s file of saved credit card numbers before any real harm had been done. The corporation could have avoided this predicament by enabling SSL (described in 7) and making use of secure e-mail through a protocol such as S/MIME (described in 8). The need for security in such situations is so obvious that we honestly don t know why it is sometimes difficult for others to grasp. No corporation would have unlocked doors. We d be willing to bet that the CEO keeps his or her possessions under lock and key, as do the company s employees. The reason is obvious: People snoop, steal, or inadvertently look at things they shouldn t.
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A number of corporations that provide goods and services to Internet customers actually do a great job protecting customer data in transit by making use of the SSL protocol. However, they fail to realize (or maybe they choose to forget) that data requires further protection once it s at rest. SSL does not protect data after it leaves the security of the protocol. After data is received by either the client or the server, that data is decrypted.
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Nevertheless, some companies fail to adequately protect such data. One corporation, an online music vendor, recently had the misfortune of having an unauthorized guest break in to its systems. The attack placed more than three million credit card numbers from the company s back-end databases at risk of disclosure on the Internet. Fortunately, in this incident, it has been reported that the credit card numbers were never obtained. Still, the potential for widespread credit card fraud was there. In news reports, the corporation s upper management stated that they didn t quite understand how the attack occurred. The company had provided for security through the use of SSL to secure connections. However, this corporation could have and should have done more in the way of security. For example, it could have encrypted the credit card numbers before placing them in the database.
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