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Additional users can be authorized to access encrypted files. Offline Files can be encrypted. Data Recovery Agents are recommended but optional. The triple-DES (3DES) encryption algorithm can be used to replace DESX. A password reset disk can be used to safely reset a user s password. Encrypted files can be stored in Web folders.

Some firewalls, known as stateful firewalls, use tables to track outbound data requests against inbound data transmissions that arrive at the firewall. For example, if a user makes a request for the URL www.microsoft.com, the firewall table records the request. When data arrives back from www.microsoft.com at the firewall, the firewall checks its table to see if data was requested from that URL. When an entry is found in the table, the data is allowed in and forwarded to the specific computer or network that initiated the request. On the other hand, any outside data that has not been explicitly requested by an internal computer is not allowed to pass through the firewall.

In addition, EFS in Windows XP Service Pack 1 includes the following new features:

By default, the Advanced Encryption Standard (AES) algorithm is now used for encrypting files with EFS. (See article 329741, EFS Files Appear Corrupted When You Open Them, in the Microsoft Knowledge Base at http://support.microsoft.com for more information.) Changes in the RC2 cipher text algorithm make it more secure. (See article 841715, You cannot decrypt data on Windows XP SP1 or later versions, in the Microsoft Knowledge Base at http://support.microsoft.com for more information.)

Finally, the Cipher.exe utility in Windows XP Service Pack 2 has been enhanced to include the /x switch supported by Windows Server 2003. This switch can be used to back up an EFS certificate and its associated keys to a file from the command line. (For more information, see article 827014, New Functionality Is Available for Cipher.exe in Windows 2000 and Windows XP, in the Microsoft Knowledge Base at http://support.microsoft.com.)

A number of firewall products use a rules-based approach. Rules can get complicated and confusing, but they are effective. Microsoft ISA Server and a number of third-party software products use rules that administrators create. The rules determine the kinds of TCP/IP traffic that are allowed into the network by defining which Web sites and IP addresses are allowed or not allowed. Rules enable you to create a configuration that works best for your environment and allow you to override default rules settings for particular users. For example, trusted sites can be granted extra access privileges, and troublesome sites (or unknown sites) can be shut out entirely.

EFS is enabled by default. Users can encrypt files if they have permission to modify the files. Because EFS relies on a public key to encrypt files, users need a public-private key pair and a public key certificate for encryption. Because EFS can use self-signed certificates, however, EFS does not require administrative effort before use. Note

The use of self-signed certificates for EFS is not recommended in a domain environment. Configuring certification authorities to deliver EFS certificates to users as part of your public key infrastructure simplifies the manageability of recovery agents.

Some higher-end software applications, including ISA Server, and some dedicated intrusion-detection hardware devices can detect an attack from the Internet by watching inbound connections for the common signatures of IP-based network attacks. When an attack is detected, the intrusion-detection system can either close the port through which the attack is being initiated, stop all Internet traffic, notify an administrator, or perform

Part III:

object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes( typeof(AssemblyCompanyAttribute), false); // If there aren t any Company attributes, return an // empty string if (attributes.Length == 0) return ; // If there is a Company attribute, return its value return ((AssemblyCompanyAttribute)attributes[0]). Company;