Hello,
Here is my last writing, which talks about some aspects of the safety and vulnerabilities of online banking. 
As I said in the document, these are just aspects but there's always a link (even if not always obvious).

Author: Zykl0n B
Size : 35 pages

Link (.docx): http://www.mediafire.com/view/?z0d4gl7fq4p3vm1
Link (.pdf): http://www.mediafire.com/view/?wcqfc9j3u9zecr6

Note: It is highly recommended to download to avoid bugs.

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I - Introduction
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II – Some aspects of the safety of online banking

Localization of data and databases
Data and encryption
URL Rewriting (tutorial)
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III - Banking software
Some key concepts
Introduction to buffer overflow (tutorial)
Stack-based overflow: attack (tutorial)
Heap-based overflow: attack (tutorial)
Polymorphism
The SEH
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IV – Ending
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