Re:USB Type-C to Become More Secure with Authentication Stan...
by dragonwriter on Friday January 04, 2019 @12:28PM
(#18825810)
> The most standard cables carry "USB 3.1" which is just another name for USB 3.0 carried over Type C connectors.
No, it's not; USB 3.1 adds the new SuperSpeed+ mode over all supported connector types (and USB 3.2 adds two additional SuperSpeed+ modes for Type-C connectors.)
USB Type-C connector spec is a separate spec issued after USB 3.1, USB 3.1 isn't USB 3.0 over Type-C connectors.
Re:USB Type-C to Become More Secure with Authentication Stan...
by jwr on Friday January 04, 2019 @02:10PM
(#18826773)
Note that there is USB 3.1 Gen1 (limited to 5Gbps) and USB 3.1 Gen2 (limited to 10Gbps).
Overall, I think a quick glance at the whole discussion under my comment proves my point quite well.
As far as I know a universal cable is not possible. My reading of the spec says that it should be but I am not a USB implementor and some of my friends who are tell me it's not possible. In any case nobody ships such a thing.
The charging cables provided with devices are likely to be power-only. With the 87W charger, Apple ships ones that can carry about 100W (the maximum per USB spec -- 20V@5A) which requires thicker conductors; my understanding is that those cables don't carry data (i.e. they can safely be plugged into any third party brick without you worrying that the remote device will attack your computer). You want a power-only cable for this purpose. I am not sure of they have the same cable with the smaller adaptors.
The very high speed cables only work over short distances unless you go to optical (which I'm not sure anybody has deployed).
The most standard cables carry "USB 3.1" which is just another name for USB 3.0 carried over Type C connectors. The higher frequency and higher power cables are more expensive to design and build so will cost the customer more. That's one reason you have to specifically look for cables for DP, PCI-e/Thunderbolt etc.