AES – Key Schedule/Key Expansion Explained

#cryptology, #cryptography, #cryptanalysis

In this video we discuss the key expansion or key scheduling of the Advanced Encryption Standard (AES) our current modern standard for symmetric encryption. AES is now older than 20 years but still very secure. All attacks found so far are only theoretical attacks. AES is the successor of the Data Encryption Standard (DES).

We also show the visualization of the AES key expansion in CrypTool 2.

If you are interested in implementing AES on your own, we highly recommend the following wikipedia articles:

You find the AES visualizations in CT-Online here:

[iHapiW]

The most clear video and tutorial that I have seen.
I appreciate this video <3.

[BeanJuiceK]

Great video, beautiful, to the point. Subscribed :^)

[williamli]

This is so unbelievably helpful. I sincerely appreciate the fact that you took the time to share this. Thank you very much.

[williammatiz]

Thank you so much! This was a great vide to understand it.

[agile]

Great video, will you guys talk also about Modes of operation? ECB, CBC, CTR, OFB, XTS, GCM?

[kayakMike]

If you always need some stuff from the previous iteration.... Or a recursive function... How could you do this in parallel?

[kevinkehoe]

If our key ids 256 bits and our plaintext is 128, how does this key expansion work?

[quintencabo]

That wikipedia image could have really been more clear