Reverse engineering in software engineering vaibhav
- 1. Reverse Engineering in Software Engineering By:- Vaibhav Dubey B.Tech(CSE) V
- 2. Introduction • Reverse engineering is taking apart an object to see how it works in order to duplicate or enhance the object. The practice, taken from older industries, is now frequently used on computer hardware and software. Software reverse engineering involves reversing a program's machine code (the string of 0s and 1s that are sent to the logic processor) back into the source code that it was written in, using program language statements.
- 3. Need • Software reverse engineering is done to retrieve the source code of a program because the source code was lost, to study how the program performs certain operations, to improve the performance of a program, to fix a bug (correct an error in the program when the source code is not available), to identify malicious content in a program such as a virus or to adapt a program written for use with one microprocessor for use with another.
- 4. Tools • Hexadecimal Dumper: Prints or displays the binary numbers of a program in hexadecimal format (which is easier to read than a binary format). • Disassembler: Reads the binary code and then displays each executable instruction in text form. A disassembler cannot tell the difference between an executable instruction and the data used by the program. • Debugger : Allows the disassembler to avoid disassembling the data portions of a program.
- 5. Types • Hardware reverse engineering involves taking apart a device to see how it works. For example, if a processor manufacturer wants to see how a competitor's processor works, they can purchase a competitor's processor, disassemble it, and then make a processor similar to it. • Another type of reverse engineering involves producing 3-D images of manufactured parts when a blueprint is not available in order to remanufacture the part.
- 6. Pros and Cons... • The pros are that if you do it right you can produce the item in question without having to design it from scratch. • The major con is that if you don’t follow some fairly complex rules you can wind up in legal trouble for stealing the original manufacturer’s intellectual property.
- 7. Thank You.