[QUESTION] encTitlekey vs decTitlekey

I want to know differences between encTitlekey and decTitlekey. In particular, I've experienced that, with CIAngel, you can download software through ninty servers by using a titleid/enctitlekey pair. However, on that titlekey site, you could add a title key by providing titleid and dectitlekey (not dectitlekey). In fact, on that site, there are some softwares which have only a dectitlekey and not an encrypted one. As far as I can tell, freeshop/CIAngel don't download anything using a dectitlekey but they use encrypted titlekeys, so in my vision the decrypted key upload in the titlekey site is pretty useless. I tried to search for the reason why both seems to be important, but I can't find anything useful. In short, my questions are:

1) What is the relation between encTitlekey and decTitlekey?

2) Since CIAngel and freeShop uses titleID and encTitlekey, why the decTitlekey is important? (seems that is even more important than the encrypted one on that titlekey site)

3) Is it possible to have CIAngel use the encTitlekey instead of the decTitlekey?

4) Is there a way to convert encrypted titlekeys to decrypted titlekeys and/or viceversa?

Thank you for the attention, I hope I'll understand more clearly this question.

 

this is what I thought, but, if this is the matter, which is the encryption key? why CIAngel wants an encrypted titlekey and not a decrypted titlekey? if they are the same thing and we can decrypt an enctitlekey into a dectitlekey and viceversa, where are the tools which allow us to do so?

 

Okay, so games that currently doesn't display an enctitlekey on that site means they are yet to be verified, this makes sense.
Thank you very much to let me understand better.

One last question: I've found a titleID/enctitlekey pair of a software which works in CIAngel (I can download it and it works). If I want to get the dectitlekey in order to upload it on that site, how could I do? I tried decrypting my titlekeys using decrypt9 and used a program to display them on the PC (NintendoCDN-TicketParser), but only legit titles appears.

EDIT: I used the scripts found in Decrypt9 zip to do that and it worked. Thank you for being so kind to me!