Software Protection: How to Crack Programs, and Defend Against

123 Pages·2014·0.95 MB·English

Software Protection:
How to Crack Programs, and
Defend Against Cracking
Lecture 8: Hardware
Moscow State University, Spring 2014
Christian Collberg
University of Arizona
www.cs.arizona.edu/˜collberg
(cid:13)c April30,2014ChristianCollberg
Introduction
This lecture
1 Disk and dongle protection against software
and media piracy.
Disk protection — distribute the program on a
physical medium, such as a CD and make the
CD hard to copy.
3/69
This lecture
1 Disk and dongle protection against software
and media piracy.
Disk protection — distribute the program on a
physical medium, such as a CD and make the
CD hard to copy.
Dongle protection — the program refuses to
run without a hardware token distributed with
the program.
3/69
This lecture...
2 Trusted Platform Module (TPM):
Small chip soldered to the motherboard of a PC
Used to boot a trusted environment
IBM/Lenovo ThinkPad ships with a TPM chips
not used in practice
4/69
This lecture...
3 Crypto-processor:
Can execute encrypted programs.
Contains encryption key.
Program is encrypted with processor’s public
key.
Only one computer can run the program!
5/69
This lecture...
4 Attacks on tamperproof hardware:
Physical attacks (shave off the top!)
Side channel attacks (“listen” to the chip!)
6/69
Dongles and
Tokens
Dongles
Dongles are hardware devices distributed
with a program.
8/69
Dongles
Dongles are hardware devices distributed
with a program.
Prevent piracy.
8/69