Elliptic curve cryptography is the engine behind all crypto-currencies including Bitcoin and Ethereum, using the secp256k1 curve. Sean Spillane will lead a discussion of elliptic curves and their use in crypto-currencies. There is a tremendous amount of material available on this topic, including a lot of youtube video presentations. Please read at least one of the references below and come prepared to participate in the discussion. If there are sub-topics you want to dive into, please comment on this event on meetup.com and suggest other literature.
https://en.wikipedia.org/wiki/Elliptic_curve_cryptography
http://arstechnica.com/security/2013/10/a-relatively-easy-to-understand-primer-on-elliptic-curve-cryptography/
https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm
https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki
http://cs.ucsb.edu/~koc/cren/docs/w03/09-ecc.pdf