Touch ID
As a Touch ID which designates US company Apple Inc. one introduced in 2013 fingerprint scanner . It was developed to be able to unlock the device in a simple way without using a password. Starting with the iPhone X, it was replaced by Face ID .
functionality
Up to five different fingerprints can be saved.
The fingerprints are not originally stored in the device, but only stored permanently in the form of a checksum . This is obtained using a hash function and stored in the iPhone. With activation, further, user-related online services can also be used.
The sensor in all Touch ID-supporting devices has a resolution of 88 × 88 pixels, which corresponds to a pixel density of 500 ppi. The surface of the sensor is made of sapphire crystal to make it robust and resistant to scratches and wear and tear. When unlocking, the scan of the fingerprint is transferred to the processor, converted into vectors and compared with the stored prints. The scanned imprint is then deleted again.
With the release of iOS 8, in addition to using Touch ID to unlock the device and to make purchases in the iTunes and App Store, third-party apps can also use the Touch ID sensor, so that even when the device is unlocked, certain apps can be opened again a fingerprint is required to use the app. You can also pay via Apple Pay . The fingerprint sensor serves as a key .
In tests of the iPhone 5s , the reliably functioning Touch ID sensor was praised.
safety
The SoC of the device contains a co-processor that is responsible for the fingerprint sensor and is operated with its own firmware. This Secure Enclave is assigned an individual ID during production that neither Apple nor the manufacturer is aware of. During the boot process it is checked whether the firmware of the co-processor is verified and signed by Apple. Any security gaps in iOS would not allow manipulation of the fingerprint data. Data that is in the shared memory with iOS is encrypted with a unique ID and a counter and should not be manipulable either by Apple or by possible attackers.
On September 21, 2013, the Chaos Computer Club (CCC) reported that they had overcome the Touch ID security lock without a real finger. A fingerprint on the display surface was scanned with a resolution of 2400 ppi and the scan was then digitally post-processed - including binarization . The processed image was printed with a laser printer at a resolution of 1200 ppi on a transparency film, which was used as a mask for the exposure of a circuit board . The UV-exposed circuit board was then etched and sprayed with graphite in order to increase the structure and conductivity of the later carrier material. Finally, the dummy finger was created with applied wood glue and incorrectly accepted in a test after a few (correct) rejections . Heise Security Editor -in- Chief Jürgen Schmidt nevertheless considers Touch ID to be sensible, practicable and an improvement in security, since " the more than 50 percent of iPhone users who currently have no locks finally have to set up a passcode " in order to work use.
Error 53
The "Error 53" occurs in connection with Touch ID if a software update and then a restoration is carried out after the home button has been replaced in a free workshop. The device can then no longer be used. Unsaved data is lost. The bug attracted media attention through an article in the Guardian . The journalist Antonio Olmos had his defective iPhone 6 display and his home button replaced in an independent workshop in Macedonia. Initially, the device could still be used after the exchange. However, error 53 occurred while installing the latest version of iOS.
The cause is the lack of comparison with the original home button and Apple's Secure Enclave, which is stored on the logic board. According to Apple, this error occurs intentionally for security reasons, in order to prevent access to the fingerprint data. The iPhone 6, iPhone 6 Plus, iPhone 6s and iPhone 6s Plus are affected, but not the iPhone 5s. It is unclear whether Error 53 violated consumer protection law as it was intentionally brought about. The problem was removed with build 13D20 of the operating system version iOS 9.2.1 , but Touch ID can still not be used, supposedly for security reasons.
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Web links
Individual evidence
- ↑ Five tips for using the iPhone 5S Touch ID fingerprint sensor. In: CNET , October 28, 2013.
- ↑ Touch ID in the iPhone 5s: sensor hardware linked to an individual A7 chip. In: Mac Life , November 1, 2013
- ↑ Touch ID: data protection department warns of finger scanners in iPhone. In: Spiegel Online , September 15, 2013.
- ↑ a b iOS Security. (PDF) In: apple.com. October 2014, accessed February 5, 2015 .
- ↑ Walt Mossberg: iPhone 5S Review: New Touch ID for iPhone. In: wsj.com. The Wall Street Journal, September 18, 2013, accessed September 21, 2013 .
- ↑ Frank Rieger: Chaos Computer Club hacks Apple TouchID . Chaos Computer Club , September 21, 2013.
- ↑ Jürgen Schmidt: The iPhone fingerprint hack . In: Heise online , September 24, 2013.
- ↑ Jürgen Schmidt: Better with touch . In: Heise online , September 24, 2013.
- ↑ Miles Brignall: 'Error 53' fury mounts as Apple software update threatens to kill your iPhone 6 . In: The Guardian . February 5, 2016, ISSN 0261-3077 ( theguardian.com [accessed February 11, 2016]).
- ↑ iPhone 6 error 53. In: iDoc repair service. Retrieved February 11, 2016 .
- ↑ Miles Brignall: Apple under pressure as lawyers pledge action over 'Error 53' codes . In: The Guardian . February 8, 2016, ISSN 0261-3077 ( theguardian.com [accessed February 11, 2016]).
- ↑ Defective iPhone after repair: Apple fixes "Error 53" - and says sorry. In: Mac & i. Retrieved December 3, 2017 .
- ↑ iPad - Compare iPad models - Apple (DE). April 11, 2018, accessed June 15, 2020 .
- ↑ iPad - Compare models - Apple (DE). June 5, 2020, accessed June 15, 2020 .