Circumventing the license check

Assignment Help Computer Engineering

Reference no: EM1318101

There is a long tradition of the copy protection and rights management associated with the software products. Among different techniques used, one of the most common is license enforcement: every copy of software has an associated digital "license" which provides the user permission to run the software. When software starts up, it checks this license and if it is not valid, refuses to run.

a) Assume the "license" is just a digitally signed file listing a hostname and expiration date; the verification key is built into the executable. How would you go about circumventing this kind of license check?

b) Now assume that the "license" is actually a piece of hardware which responds to cryptographic challenges at regular intervals. The hardware device, has a certificate signed by the rights owner, whose public key is built into software. How does this affect circumvention?

Reference no: EM1318101

Questions Cloud

Total number of arrangements : Total number of arrangements.

Object oriented design of a class : Object oriented design to develop a parent class known as Book which will receive the ISBN, author, title and price of book and select and print the details of all books with the price of more than $50.00.

What is the distribution of sample means : What is the distribution of sample means.

Why continuity correction is necessary : Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.

Circumventing the license check : Assume the "license" is just a digitally signed file listing a hostname and expiration date; the verification key is built into the executable. How would you go about circumventing this kind of license check?

The mean of a standard normal probability distribution : The mean of a standard normal probability distribution.

Compute the probability : Compute the probability

If the mean of a normal distribution is negative : Continuous random variable is uniformly distributed between a and b. The probability density function between a and b is.

Differentiated services and set of contiguous routers : Explain in scholarly detail why the differentiated services (DS) domain consists of the set of contiguous routers?

User Account

All Pages