maemo.org - Talk - Purism Librem Phone

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Re: Purism Librem Phone

Quote:

Originally Posted by Venemo (Post 1535384)

The "sandbox" means:

The modem does not access system memory
Power input of the modem is controlled by the application processor
Audio input of the modem is controlled by the application processor

The above points are effective solved by having a separate module or chip for the modem and only communicating with it via a simple serial port. Plus, adding a switch to its power supply and audio.

However, some people are even more paranoid and add an RF switch between the modem and the antenna, "just to be sure". :D

Not sure how far the Neo900 and the Purism go with this, though. (Neo900 had a detailed doc somewhere but I can't find it now.)

A sandbox provides a highly controlled environment. I'm not entirely sure what you mean by serial port or how it would work but the Librem 5 product description mentions nothing this, nothing of a baseband sandbox, nor any sort of controlled environment. They simply state that the baseband will be separate from the SoC. This design is of course better than most modern smartphones which integrate the baseband in the SoC but it is by no means a sandbox. If you have 5 minutes spare, here is a video which provides a quick overview of what the Neo900 guys are doing.

Re: Purism Librem Phone

Quote:

Originally Posted by wicket (Post 1535403)

So now the world sandbox makes stuff more private cmon?

Seriously what makes this different from what librem guys will do? How can you be sure neo900 is better? Based on what info?

You could just make it easy by turn the damn modem totally off with a simple FET solution and then call it fetbox privacy phone as a marketing hype will that make it better than sandbox or worse?

Re: Purism Librem Phone

Quote:

Originally Posted by wicket (Post 1535403)

A sandbox provides a highly controlled environment.

I'd be interested to hear how you imagine the hardware implementation of your sandbox, if not the way I described it to you.

Re: Purism Librem Phone

Quote:

Originally Posted by Venemo (Post 1535516)

I'd be interested to hear how you imagine the hardware implementation of your sandbox, if not the way I described it to you.

On a seperate chip, connected by high-speed serial uart, instead of inside the SoC with shared memory driver.

Quote:

Originally Posted by Venemo (Post 1535384)

The above points are effective solved by having a separate module or chip for the modem and only communicating with it via a simple serial port. Plus, adding a switch to its power supply and audio.

Yeah... what he said.

EDIT: this is also basically what the neo900 guys are talking about, but with a bit of monitoring so you can guess when something you don't want is happening.

Re: Purism Librem Phone

Quote:

Originally Posted by Venemo (Post 1535516)

I'd be interested to hear how you imagine the hardware implementation of your sandbox, if not the way I described it to you.

Pretty much what r0kk3rz said. The key things here are the hardware monitors and how the device reacts to rogue activity. The Neo900 can watch the radio for any unexpected activity, it can watch the CPU-modem data link and knows if it becomes active when it shouldn't, and it can also watch the power consumption of the modem to detect if it's being used when it shouldn't be.

Additionally, the input audio of the Neo900 modem will be disconnected. This means the input audio has been separated so the modem has to ask the CPU when it wants to use the audio channel. It's able to detect if the modem goes rogue and act appropriately.

EDIT: Don't get me wrong. Despite my criticisms, I think the Librem 5 would be a great product and I want to see it succeed. There's nothing else like it on the market today and if it was available now I'd buy it in an instant. I'd probably be prepared to pay even more than what they asking for. That doesn't mean I'm going to hold back from pointing out the lies and bullsh¡t in their campaign. I'd love to support it but I can't. $600 is too much money for me to risk on a product that doesn't exist. It's a shame they don't offer a pre-order deposit of say $100 to allow more people to support them.

Re: Purism Librem Phone

Quote:

Originally Posted by wicket (Post 1535548)

$600 is too much money for me to risk on a product that doesn't exist.

Yet you do not feel the same restraint about Neo900 ;)

Re: Purism Librem Phone

I contributed. Because we deserve to have more choices.

Re: Purism Librem Phone

I will backed Librem Phone 5, this is one of most important project in the histories of GNU; Thx Purism | Jolla is still far from this philosophy. But i love SailfishOS even with stinky-blobs