Many of the tools used to capture passwords can also

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Unformatted text preview: another, the company could have much more damage to deal with than if it had properly restricted his access. Password Sniffing I think I smell a password! Password sniffing is just what it sounds like—sniffing network traffic with the hope of capturing passwords being sent between computers. Several tools are available on the Internet that provide this functionality. Capturing a password is tricky, because it is a piece of data that is usually only used when a user wants to authenticate into a domain or access a resource. Some systems and applications do send passwords over the network in cleartext, but a majority of them do not anymore. Instead, the user’s workstation performs a one-way hashing function on the password and sends only the resulting value to the authenticating system or service. The authenticating system has a file containing all users’ password hash values, not the passwords themselves, and when the authenticating system is asked to verify a user’s password, it compares the hashing value sent to what it has in its file. Many of the tools used to capture passwords can also break the encryption of the password. This is a common way for a computer crime to start. IP Spoofing I couldn’t have carried out that attack. I have a different address! Response: I’m not convinced. Networks and the Internet use IP addresses like we use building numbers and street names to find our way from one place to another. Each computer is assigned an IP address so packets know where they came from and where they are going. However, many attackers do not want anyone to know their real location, so they either manually change the IP address within a packet to show a different address or, more commonly, use a tool that is programmed to provide this functionality for them. This type of activity is referred to as IP spoofing. Several attacks that take place use spoofed IP addresses, which give the victim little hope of finding the real system and individual who initiated the attack. One r...
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