And since you asked it, we have set up this forum where such links can be posted.
So I've removed all earlier replies to this question, and put the info (with others) into a separate posting.
there is no single key of either Irdeto of Seca. Every Irdeto provider uses a unique set of keys. Every Seca provider uses a unique set of keys.
Some Irdeto providers change keys several times per day.
More important: no actual keys may be posted on this board. So you will have to look elsewhere. That's why I provided all the links...