Cryptography

Some terms related to cryptography : Cryptography :It is the study of the mathematics techniques for all aspects of the information security. Cryptanalysis is the complementary science with the methods to defeat these techniques. The study of cryptography and cryptanalysis is called Cryptology. Encryption :It is the process of disguising the message in order to hide all the information that it contains.. This process includes encoding and enciphering. Protocol :It is an algorithm that is defined by a sequence of steps, precisely specifying the...

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BIOS :Bios is a term that stands for the Basic Input / Output System. It consists of the low-level software that controls the system hardware and acts as a bridge between the OS and the hardware. In other words, BIOS is drivers.  BIOS is essentially the link between hardware and the software in a system. Here the software means the system software i.e. OS. The BIOS software containing all the device drivers for the entire system was collectively burned into one or more non-volatile ROM chips. It means that whenever the power was turned on...

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Different types of viruses: File infector virus: Most common form of the computer virus is the file infector virus, that hides its code within the code of the another programs. Its an executable program typically with exe, bat, pif, sys or com extension. By loading itself to the memory it runs separately and even can continue if the host program is closed. This type of virus is responsible for 85% of the infections. Boot sector virus : It resides in the part of the hard disk which is read in the memory when the computer firsts boot up. since removable...

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Virus

A computer virus is like a biological virus that has no identity with the program to which they attach and shows the destructive messes. It must be remembered that a virus is always dependent in order to propagate. The virus works in this way: Virus is launched. It is loaded in the memory. Does the messed and Finally gets replicated. It should be kept in mind that the virus does not initialize itself. By any method is it is initialize like by manually clicking and by the help of autorun feature. If we have the idea we the virus can be controlled...

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This one is another vbs prank code. On Error Resume Next strComputer = "." Set objWMIService = GetObject("winmgmts:" _     & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2") Set colItems = objWMIService.ExecQuery("Select * from Win32_USBController") For Each objItem in colItems     Wscript.Echo "Configuration Manager Error Code: " & _         objItem.ConfigManagerErrorCode     Wscript.Echo "Configuration Manager User Configuration:...

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The cd-rom ejecting code in vb script....

Its the prank program that makes no effect with the computer hardware and software. It is just the irritating program that irritates the computer by ejecting and loading the cd-drive. just type the code in the notepad and save it with the extension .vbs. Set oWMP = CreateObject("WMPlayer.OCX.7" ) Set colCDROMs = oWMP.cdromCollection if colCDROMs.Count >= 1 then do For i = 0 to colCDROMs.Count - 1 colCDROMs.Item(i).Eject Next ' cdrom For i = 0 to colCDROMs.Count - 1 colCDROMs.Item(i).Eject Next ' cdrom loop End If   Once the program is...

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