Merge branch 'mrblueblue-crypto'

free-courses-en.md

@@ -73,7 +73,6 @@
 ### iOS
 * [AppCoda Complete iOS Tutorial](http://www.appcoda.com/ios-programming-course/)
 * [Developing iOS 7 Apps for iPhone and iPad](https://itunes.apple.com/us/course/developing-ios-7-apps-for/id733644550)
-* [Stanford CS 193P iPhone Application Development](http://web.stanford.edu/class/cs193p/cgi-bin/drupal/)
 
 
 ### Java
@@ -107,6 +106,9 @@
 * [Computer Graphics](http://nptel.ac.in/courses/106106090/)
 * [MIT´s Computer Language Engineering](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-035-computer-language-engineering-sma-5502-fall-2005/lecture-notes/)
 * [MIT´s Mathematics for Computer Science](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-042j-mathematics-for-computer-science-fall-2010/video-lectures/)
+* [MIT´s Introduction to Algorithms](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/)
+* [Stanford Cryptography I](https://www.coursera.org/course/crypto)
+* [Stanford Cryptography II](https://www.coursera.org/course/crypto2)
 
 
 ### OCaml