This chapter covers the main modules we have in python for encrypting and decrypting information, such as pycrypto and cryptography. Also we cover steganography techniques and how to hide information in images with the stepic module.

The following topics will be covered in this chapter:

• The pycrypto module for encrypting and decrypting information
• The cryptography module for encrypting and decrypting information
• The main steganography techniques for hiding information in images
• How to hide information in images with the stepic module