Running software often faces serious threats

for example

the core algorithm is reversed or confidential information is leaked.So

it is needed to study effective protection methods against dynamic attack.The paper includes two aspects.First

do in-depth analysis and comprehensive comparison of the existing method of software protection against dynamic attacks.According to four mainstream software protection methods against anti-dynamic attack

we do comprehensive comparison of these four protection methods from three indicators of implementation difficulty

performance impact and security.Second

Introduce the work of our two studies in software protection against anti-dynamic attacks through examples.They are a software protection method based on dynamic deformation engine and a security-enhanced software protection based on virtual machine.