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Hackers can wreak havoc without ever penetrating your system. For example, a hacker can effectively shut down your computer by flooding you with obnoxious signals or malicious code. This technique is known as a denial-of-service attack. Hackers execute a denial-of-service attack by using one of two possible methods. The first method is to flood the target computer or hardware device with information so that it becomes overwhelmed. The alternative method is to send a well-crafted command or piece of erroneous data that crash...
Exploiting a buffer overflow is an advanced hacking technique. However, it is a leading type of security vulnerability. To understand how a hacker can use a buffer overflow to infiltrate or crash a computer, you need to understand exactly what a buffer is. A computer program consists of many different variables, or value holders. As a program is executed, these different variables are assigned a specific amount of memory as required by the type of information the variable is expected to hold. For example, a short integer ...
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4. Virus Prevention ~ How to protect against Internet Viruses
There are several elements to a good virus defense. The most important element requires some self-control—you must NEVER open a file/program unless you are 100% sure it is not infected. No matter how attractive the file is, where it came from, or what it promises you, you can never assume that a file is what it claims to be. For example, the Melissa virus reproduced through email and sent copies of itself to every one in the victim's address book. Because of this, relatives and friends of the victim were soon infected as ...
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The dangers of Trojans and viruses are well known. However, many computer users are completely unaware of the dangers involved in viewing Web pages. Through scripting languages, Web page operators can upload and download files to your device (PC/PDA). They can also install mini-programs or grab information from you that can be used to destroy or take over your computer. Every time you go to a Web page, you actually download the full document to your computer. This includes all text, pictures, and even any code that is r...
6. Features of Windows Encrypting File System (EFS)
• Only available on Windows 2000 and Windows XP operating systems using NTFS partitions and volumes. (NTFS v5). • Encryption is transparent to the user. • Uses public-key encryption. Using a public key from the user’s certificate encrypts keys that are used to encrypt the file. The list of encrypted fileencryption keys is kept with the encrypted file and is unique to it. When decrypting the file encryption keys, the file owner provides a private key that only he has. ...
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Hackers can wreak havoc without ever penetrating your system. For example, a hacker can effectively shut down your computer by flooding you with obnoxious signals or malicious code. This technique is known as a denial-of-service attack. Hackers execute a denial-of-service attack by using one of two possible methods. The first method is to flood the target computer or hardware device with information so that it becomes overwhelmed. The alternative method is to send a well-crafted command or piece of erroneous data that crash...