Ird Mod vs No Ird Mod

[four_sexta]

Hi, when penga made the Rom 10 work, I remember having to change my boxkeys & receiver # to 87382EC5ACC1047E and 0162B382 respectively. In addition, we had to apply a ".fs" script to modify the tsop. If I'm not mistaken, this was a RSA mod. Later released, were different boxkeys & receiver # that if used, the tsop would not need to be modified. Hence, the No RSA mod method. My question is, how come we didn't have to modify the tsop if using one method over the other? What was so special about the boxkeys in method 1 over the boxkeys in method 2?

Thanks.

[four_sexta]

Anyone, please?

[Dave411]

As I remember, the RSA mod came about because no N2 was opened making DT06 (remember P&Q and N&D) unavailable. The RSA mod used a static key to decrypt the signal. Once the 101 was opened and a complete keyset (present public keys) was available, including DT06, the RSA was no longer needed.

[four_sexta]

I now have a virgin Rom 102 @ Rev 103 with no keysets (ie DT08) on the card. I am planning on using a public fix with the provided boxkeys & ird#. Do I just change the boxkeys & ird # from my receiver to match the public fix, or do I need to apply a script to the tsop as well? Also, if charlie updates the software version of the receiver, must I redo the tsop everytime?

Thanks

[Dave411]

Yep, just write the correct numbers to your TSOP and you are good to go and firmware updates will not affect it. This is assuming you are using a DT08 receiver and not an SK type receiver, like 013 or 510.

[four_sexta]

I'm using a 2800 receiver so it does use DT08. Just for curiousity, why can't I instead changed the boxkeys & ird # in the card bin to match the numbers currently on my receiver?

[Dave411]

N2 doesn`t work that way. The key set consists of IRD#, BKs, Cam#, DT08, DT06. They are a set and you can not substitute #s within the keyset.

[four_sexta]

Okay, I see what your saying. The key set is all correlated. That is, there's an algorithm in the stream that checks if the key set is valid. In order to change the boxkeys and ird# to the ones in my receiver I would have to use GenDT08 v3.3 so that it can derive the corresponding key set for the card. Am I correct?

[Dave411]

Pretty much correct. I think of it more as an equation that needs all 5 factors to equal the correct answer (signal decryption). You can change the IRD# and BKs on the card, but would only get 101 etc. I have never needed to use GenDT08 so not much help there. My impression was that it modifies the TSOP, which works great on SK receivers, but I figured a firmware upgrade would overwrite the modded TSOP in a DT08 receiver. Not sure though. Good luck with your project.

[four_sexta]

So "Dave411", in other words you're using the public keys instead of your own boxkeys & ird #, since you didn't use GenDT08, right? Also, the tsop that's currently in my receiver has been modified using the ".fs" script that was required to get the Rom 10 back up. Now that I'm trying to get the 2800 receiver to work with my Rom 102 I will change the keys on the receiver to match the public ones. My question is, can I change the keys on this modified tsop bin or must I change the keys on the original tsop bin?

Thanks

[Dave411]

No, I`m using "private keys". If you have an ex-subbed DT08 card, then after you open it, you will have a private keyset with private IRD# and BKs, etc. This, of course, is much more desirable. However, the public keys have been working all this time. Since you have a RSA modded TSOP, you need to get rid of that either by updating firmware or just loading a good TSOP onto the receiver with the public IRD# and BKs. If you have the original TSOP, I would change it to the public numbers, load it on the receiver, and let it update.

[four_sexta]

Thanks for the info. Your answers to my questions have been really informative. I have a copy of my original tsop so I will just change the ird # and boxkeys to the public ones. Now, when charlie decides to change the receiver software, will I need to re-flash my tsop everytime, as I had previously been doing with the Rom 10?

Thanks a lot

[Dave411]

You`re welcome. Nope, once you get the TSOP done, then all you will be changing is the blocker on the card whenever a new rev comes out. Enjoy!

Dave

[Texas Trophy]

Just for clarification you can use the original IRD and BK #s as long as it hasn't been blacklisted. You will however need to use a known good cam #.

[four_sexta]

You`re welcome. Nope, once you get the TSOP done, then all you will be changing is the blocker on the card whenever a new rev comes out. Enjoy!

Dave

Thank you "Dave411" for the help, I got it to work!

[four_sexta]

Just for clarification you can use the original IRD and BK #s as long as it hasn't been blacklisted. You will however need to use a known good cam #.

But I would still need to use GenDT08 even if I want to use the original ird & BK #s, right?

[Texas Trophy]

Yes you need to use GenDT to marry the card to the receiver.

[four_sexta]

If I use GenDT will I have to jtag my receiver everytime charlie updates the software version on my receiver?

[Texas Trophy]

No

[four_sexta]

But I thought GenDT08 uses an RSA mod for the receiver and RSA Modded receivers need to be jtagged everytime there's a receiver software update. Please explain.