[TYPO3-ttnews] tt-news own catmenu

[thomas]

Hi,

I'd like to build my own catmenu for ttnews. For complete building of the 
link I need to get the cHash-value.
example:

http://domain/index.php?id=9&tx_ttnews[cat]=1&cHash=70ec147b4e

Where can I get this value?

Thanks,

Thomas