IPSec implementation

[M.Bhutta at surrey.ac.uk]

Hi All, 
I am a PhD student in University of Surrey working on Network security .. In my project, I have to work on the IPSec in Linux Kernel .. I have following questions, any level of help will be really appreciated. 
 
1. I am new to linux kernel programming, any beginner book suggestion (many books are available in market). 
2. I want to work on IPSec in linux kernel, so any kind of group, forum, book, tutorial on details of IPSec Implementation in Linux .. 
3. If I use Ubuntu rather than Fedora or Red Hat Linux, does it matter. In my understanding the linux kernel is same..  Or there any changes ? 
 
Thanks for help.. 
 
looking forward for guidance.. 
 
best regards,
Nasir
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