heechan.yang

The paper addresses the idea that the source code is not what is actually executed. This idea is defined as the WYSINWYX (What You See Is Not What You eXecute) phenomenon. The paper elaborates more on this phenomenon by showing concrete examples in program compilation and execution. The author explains that such phenomenon is caused due to the operations of compilers such as dead code eliminatio..

learn concepts I didn’t knowLifetime of a variableperiod during which the variable is stored in memory and remains accessible by the program.The lifetime of sensitive variables has to be short, to minimize the risk of exposure.compiler optimization may eliminate some codes such as overwriting the values in a address BECAUSE IT IS NOT USED FURTHER.Arithmetic on pointers used for indrection functi..

Paper Summary:Through this paper "Reflection on Trusting Trust", the author shares a moral that no code should be fully trusted even after great effort of analysis. The author builds up to his claim with thee stages that together, explains an example case of an attack within C compiler. The first stage shows a small example of a program the produces a self-reproducing program. It shows how it is..