These are some works of mine i (all written in german!) produced while my studies at the university of applied sciences in regensburg:
my first internship semester at verio germany: developing dynamic webpages with php and mysql
speech about ipsec as an example of symetric and asymetric techinques of cryprography
just in case you want to employ me and/or you got an application mail by me: this is the link you maybe are interessted in.