[dvse]

There is a number of really quite good applied maths courses on youtube (roughly in this order from each group):

MIT 18.06, 18.085, 18.086, 6.262, 6.450

Stanford EE263, EE364A, EE261

Profs Strang, Boyd and Gallager are quite a bit better with maths than the typical engineering lecturer, even though their courses are not exactly at the level of Rudin, Breiman et al.

[lhh]

My favorite math class was probably 18.310, intro to applied math, which is on ocw: http://ocw.mit.edu/courses/mathematics/18-310c-principles-of...

It's not comprehensive by any means, and you probably need to know at least calculus to be ready for most of this, but it covers some pretty cool stuff, including RSA.