From wikipedia:
If certain sub-systems fail, or are taking too long to respond, or are consuming too much power, the chip can instantly change its behavior by 'blowing' an eFUSE.
Compare with mydroidworld:
If the eFuse failes to verify this information then the eFuse receives a command to "blow the fuse" or "trip the fuse". This results in the booting process becoming corrupted and resulting in a permanent bricking of the Phone. This FailSafe is activated anytime the bootloader is tampered with or any of the above three parts of the phone has been tampered with.
The second quote makes it sound like efuse was meant to be a security measure against tampering. I say, "never attribute to malice that which can be adequately explained by stupidity". No, it did not come with "hardware that bricks the phone if you try to root it". I think if they wanted that, they could have came up with a much cheaper solution that this sophisticated technology.
Source: I worked with efuses on a major electronic component that's statistically about 20% likely to be sitting on your desk.
An efuse is basically just a low-power fuse. Think of it like a one-way switch. You can switch it to the other position exactly once, but you can't switch it back. Lots of OEMs use it for permanent storage, some of them DRM-related. Market segmentation is a common usage.
Your comment is akin to a homeowner installing an alarm system. "What do these wires have to do with keeping burglars out?" and "damn wires and their electric fields, there are much less sophisticated ways of keeping burglars out".
This is misinformed in two ways: 1) efuses are regularly used to prevent tampering with hardware although they can be used for other things. I say this as someone who worked on a product where they were used in just that manner. saying you can do other things with them is like saying you can peel grapes with a machete.
2) efuses are not terribly sophisticated. There's a good chance you have some on your desk right now. There are cheaper ways of doing storage, but the cheaper ways do not preserve the property that they form part of a good security system. So actually the statement is "because the system is this complicated, we know it is a security measure against tampering".
From wikipedia: If certain sub-systems fail, or are taking too long to respond, or are consuming too much power, the chip can instantly change its behavior by 'blowing' an eFUSE.
Compare with mydroidworld: If the eFuse failes to verify this information then the eFuse receives a command to "blow the fuse" or "trip the fuse". This results in the booting process becoming corrupted and resulting in a permanent bricking of the Phone. This FailSafe is activated anytime the bootloader is tampered with or any of the above three parts of the phone has been tampered with.
The second quote makes it sound like efuse was meant to be a security measure against tampering. I say, "never attribute to malice that which can be adequately explained by stupidity". No, it did not come with "hardware that bricks the phone if you try to root it". I think if they wanted that, they could have came up with a much cheaper solution that this sophisticated technology.