Topics discussed include elliptic curve crypto, ECDSA, Schnorr signatures, signature aggregation, BLS signature schemes, pairing crypto, group signatures, block-level signature aggregation, transaction-level signature aggregation, post-quantum crypto, quantum mining ASICs, provable solvency schemes, scrypt password hashing, and balloon hashing.
(I would include the text directly but it's nearly 60 kilobytes in size and past the point where I am presently comfortable with gunking up other mailboxes.)