Bibliography markup improvement
Early draft of KDF section
Add (H)KDF acronyms
Explain why you would want a KDF in the first place
Explain that KDFs sometimes take salts
More about salts in KDFs
Make it clear what we're doing with the ECB construction
Clarify that ECB is just one of many modes of operation
Pre-announce attacks on ECB mode so that readers know better what to expect
Fix the sentence explaining what an active attack on ECB can do