Skip to Content
Python for Offensive PenTest
book

Python for Offensive PenTest

by Hussam Khrais
April 2018
Intermediate to advanced content levelIntermediate to advanced
176 pages
4h 16m
English
Packt Publishing
Content preview from Python for Offensive PenTest

Cipher Block Chaining (CBC) mode encryption

The Block Mode means that we need to send data in the form of chunks:

For instance, if we say that we have a block size of 512 bytes and we want to send 500 bytes, then we need to add 12 bytes additional padding to reach 512 bytes of total size. If we want to send 514 bytes, then the first 512 bytes will be sent in a chunk and the second chunk or the next chunk will have a size of 2 bytes. However, we cannot just send 2 bytes alone, as we need to add additional padding of 510 bytes to reach 512 in total for the second chunk. Now, on the receiver side, you would need to reverse the steps by removing ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Python Penetration Testing Cookbook

Python Penetration Testing Cookbook

Rejah Rehim

Publisher Resources

ISBN: 9781788838979Supplemental Content