Yes. There is [1] which is on Yubikey OTP specifically. And on a lot more that focus on general embedded platforms running common cryptographic algorithms. U

Yes. There is [1] which is on Yubikey OTP specifically. And on a lot more that focus on general embedded platforms running common cryptographic algorithms. U2F uses elliptic curve cryptography (ECC) internally -- check out this source for DPA on ECC [2]. [1] http://link.springer.com/chapter/10.1007/978-3-642-41284-4_11 http://link.springer.com/chapter/10.1007/978-3-642-41284-4_1... [2] http://saluc.engr.uconn.edu/refs/sidechannel/ http://saluc.engr.uconn.edu/refs/sidechannel/