- Joined
- Oct 21, 2022
- Messages
- 18
Hey all,
I'm really hoping this doesn't turn into a flame war or anything, I'm just trying to better understand the key differences in implementation.
Question
I'm aware that companies like Anytone, Hytera, Motorola, etc. offer encryption in their DMR radios, and I know that Anytone and Hytera specifically offer AES-256 encryption. Meanwhile, P25 radios from EFJ, Motorola, etc. also offer AES-256 encryption. I can only speak direct experience to older EFJ 5100/5300 series radios and the XTS line requiring keyloaders in order to encrypt them, and that the encryption is done on the hardware via a custom board. My question is, how is AES-256 done on the DMR side? Are there crypto boards on DMR radios? Do modern P25 radios no longer have crypto boards and they have unified the design?
I know that P25 radios are pretty hardened against physical attacks so that, as an example, if a police officer loses a radio someone can't just pull they keys and listen in. I'm curious how DMR handles something like this? I also realize that you can easily avoid any real issue here by simply rotating keys in a semi-consistent manner, and doing a forced key change upon a radio getting lost, so this isn't really for any real application and more so just pure interest at this point from some of the conversations I've read online.
If anyone can point me to anything on the subject it would be awesome, as I'm struggling to find any real data out there.
I'm really hoping this doesn't turn into a flame war or anything, I'm just trying to better understand the key differences in implementation.
Question
I'm aware that companies like Anytone, Hytera, Motorola, etc. offer encryption in their DMR radios, and I know that Anytone and Hytera specifically offer AES-256 encryption. Meanwhile, P25 radios from EFJ, Motorola, etc. also offer AES-256 encryption. I can only speak direct experience to older EFJ 5100/5300 series radios and the XTS line requiring keyloaders in order to encrypt them, and that the encryption is done on the hardware via a custom board. My question is, how is AES-256 done on the DMR side? Are there crypto boards on DMR radios? Do modern P25 radios no longer have crypto boards and they have unified the design?
I know that P25 radios are pretty hardened against physical attacks so that, as an example, if a police officer loses a radio someone can't just pull they keys and listen in. I'm curious how DMR handles something like this? I also realize that you can easily avoid any real issue here by simply rotating keys in a semi-consistent manner, and doing a forced key change upon a radio getting lost, so this isn't really for any real application and more so just pure interest at this point from some of the conversations I've read online.
If anyone can point me to anything on the subject it would be awesome, as I'm struggling to find any real data out there.