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What is GCM? Galois Counter Mode (of operation) (usually seen as AES-GCM)

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Published on Jul 2, 2015

In this video I'm explaining what is that Galois Counter Mode that provides Authenticated Encryption with Associated Data (AEAD). You must have heard it combined with AES, and maybe used in TLS, ... This is just a small explanation, you can get more on the NIST specs.

Errata (thanks to Casper Kejlberg-Rasmussen in the comments)

error at 11:21, the last M_H that is applied before going into the TAG should not be there if you compare your drawing to the diagram on https://en.wikipedia.org/wiki/Galois/....

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Cheers!

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