Btw. it is not just about date and location. Many cameras also add the lens, aperture, exposure time and the like, which can be very useful for post-processing. I think most EXIF information isn't that sensitive.
And regarding the timestamp: it isn't that accurate after all, because the timezone is 'local' (whatever that means). So if you don't know where the picture has been taken or can't be sure that the device actually uses the local timezone (who changes the time on his DSLR when he travels to a different timezone?), you can only derive the date with certainty.
After all, whenever you post an image online you should be aware of the information you put out there. For example, if you are an American and in the background of the picture is the Eiffel Tower, a burglar doesn't have to be Sherlock Homes to guess that you are on vacation.
In addition, the article is about the information that is not explicitly encoded into the image (like EXIF), but implicitly reveals the sensor fingerprint, which you would not see even if you would take a look at every byte in the file, because you need to know what exactly to look for. If you know what too look for, you could theoretically see it even on the printed version of the picture ;-)
And regarding the timestamp: it isn't that accurate after all, because the timezone is 'local' (whatever that means). So if you don't know where the picture has been taken or can't be sure that the device actually uses the local timezone (who changes the time on his DSLR when he travels to a different timezone?), you can only derive the date with certainty.
After all, whenever you post an image online you should be aware of the information you put out there. For example, if you are an American and in the background of the picture is the Eiffel Tower, a burglar doesn't have to be Sherlock Homes to guess that you are on vacation.
In addition, the article is about the information that is not explicitly encoded into the image (like EXIF), but implicitly reveals the sensor fingerprint, which you would not see even if you would take a look at every byte in the file, because you need to know what exactly to look for. If you know what too look for, you could theoretically see it even on the printed version of the picture ;-)