Alphanumeric code
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In general, in computing, an alphanumeric code is a series of letters and numbers (hence the name) which are written in a form understandable and processible by a computer. One such alphanumeric code is ASCII.
More specifically, in computer underground terminology alphanumeric code is machine code that is written so that it assembles into entirely readable ASCII characters such as "a"-"z", "A"-"Z", "1"-"9", "#", "!", "@", and so on.
Writing alphanumeric code requires a good understanding of machine code encoding scheme for the specific architecture on which the code is to be executed.
This code is used by crackers with the intent of fooling applications, such as Web forms, into accepting code used for exploit. Typically, such exploits involve buffer overflows.
Sometimes, alphanumeric code could also be used when the programmer needs to write a program but does not have access to any compiler or assembler. All that is needed to write an alphanumeric program is a text editor.
[edit] External links
- Shellcoding for Linux and Windows - Printable Shellcode - Explanation and tutorial
