Why are pins required on boot on devices with fingerprint readers?
Both my iPad and my android phone are configured to allow access via either a pin, or a fingerprint scan. However, immediately after a reboot, neither device allows a fingerprint for the first unlock; the pin is required instead. Both devices state "a pin is required to unlock after a reboot".
Why is this? What risk is associated with allowing a fingerprint unlock directly after a power on?
authentication biometrics boot
edited 2 hours ago
forest
33k15106113
asked 2 hours ago
Jason C
185114
add a comment |
Both my iPad and my android phone are configured to allow access via either a pin, or a fingerprint scan. However, immediately after a reboot, neither device allows a fingerprint for the first unlock; the pin is required instead. Both devices state "a pin is required to unlock after a reboot".
Why is this? What risk is associated with allowing a fingerprint unlock directly after a power on?
authentication biometrics boot
edited 2 hours ago
forest
33k15106113
asked 2 hours ago
Jason C
185114
Can somebody retag this if needed? I couldn't find anything more specific.
– Jason C
2 hours ago
Possible duplicate of Why do mobile devices force user to type password after reboot?
– forest
50 mins ago
I just found this duplicate. The answer explains why this is the case even with fingerprint readers.
– forest
49 mins ago
add a comment |
Both my iPad and my android phone are configured to allow access via either a pin, or a fingerprint scan. However, immediately after a reboot, neither device allows a fingerprint for the first unlock; the pin is required instead. Both devices state "a pin is required to unlock after a reboot".
Why is this? What risk is associated with allowing a fingerprint unlock directly after a power on?
authentication biometrics boot
edited 2 hours ago
forest
33k15106113
asked 2 hours ago
Jason C
185114
Both my iPad and my android phone are configured to allow access via either a pin, or a fingerprint scan. However, immediately after a reboot, neither device allows a fingerprint for the first unlock; the pin is required instead. Both devices state "a pin is required to unlock after a reboot".
Why is this? What risk is associated with allowing a fingerprint unlock directly after a power on?
authentication biometrics boot
authentication biometrics boot
edited 2 hours ago
forest
33k15106113
asked 2 hours ago
Jason C
185114
edited 2 hours ago
forest
33k15106113
asked 2 hours ago
Jason C
185114
edited 2 hours ago
forest
33k15106113
edited 2 hours ago
forest
33k15106113
edited 2 hours ago
forest
33k15106113
33k15106113
asked 2 hours ago
Jason C
185114
asked 2 hours ago
Jason C
185114
asked 2 hours ago
Jason C
185114
185114
Can somebody retag this if needed? I couldn't find anything more specific.
– Jason C
2 hours ago
Possible duplicate of Why do mobile devices force user to type password after reboot?
– forest
50 mins ago
I just found this duplicate. The answer explains why this is the case even with fingerprint readers.
– forest
49 mins ago
add a comment |
Can somebody retag this if needed? I couldn't find anything more specific.
– Jason C
2 hours ago
Possible duplicate of Why do mobile devices force user to type password after reboot?
– forest
50 mins ago
I just found this duplicate. The answer explains why this is the case even with fingerprint readers.
– forest
49 mins ago
Can somebody retag this if needed? I couldn't find anything more specific.
– Jason C
2 hours ago
Can somebody retag this if needed? I couldn't find anything more specific.
– Jason C
2 hours ago
Possible duplicate of Why do mobile devices force user to type password after reboot?
– forest
50 mins ago
Possible duplicate of Why do mobile devices force user to type password after reboot?
– forest
50 mins ago
I just found this duplicate. The answer explains why this is the case even with fingerprint readers.
– forest
49 mins ago
I just found this duplicate. The answer explains why this is the case even with fingerprint readers.
– forest
49 mins ago
add a comment |
2 Answers
2
active
oldest
votes
The PIN is used to derive an encryption key, whereas the fingerprint is used only for authentication. Because the encryption key is kept in memory during runtime, it is lost after a reboot and needs to be supplied again. It is supplied via the PIN or passphrase that you are required to enter.
answered 55 mins ago
forest
33k15106113
add a comment |
This is not a full answer and would be a comment but I don't have the rep. Sorry.
Why iOS asks for a pin initially is exaplined in this Black Hat talk at about 15 minutes. I naively assume Android is similar (?).
answered 1 hour ago
user8998021
11
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@JasonC Heh you're right. I saw "This is not a full answer" and then "Why [...]" and flagged as NAA.
– forest
57 mins ago
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
The PIN is used to derive an encryption key, whereas the fingerprint is used only for authentication. Because the encryption key is kept in memory during runtime, it is lost after a reboot and needs to be supplied again. It is supplied via the PIN or passphrase that you are required to enter.
answered 55 mins ago
forest
33k15106113
add a comment |
The PIN is used to derive an encryption key, whereas the fingerprint is used only for authentication. Because the encryption key is kept in memory during runtime, it is lost after a reboot and needs to be supplied again. It is supplied via the PIN or passphrase that you are required to enter.
answered 55 mins ago
forest
33k15106113
add a comment |
The PIN is used to derive an encryption key, whereas the fingerprint is used only for authentication. Because the encryption key is kept in memory during runtime, it is lost after a reboot and needs to be supplied again. It is supplied via the PIN or passphrase that you are required to enter.
answered 55 mins ago
forest
33k15106113
The PIN is used to derive an encryption key, whereas the fingerprint is used only for authentication. Because the encryption key is kept in memory during runtime, it is lost after a reboot and needs to be supplied again. It is supplied via the PIN or passphrase that you are required to enter.
answered 55 mins ago
forest
33k15106113
answered 55 mins ago
forest
33k15106113
answered 55 mins ago
forest
33k15106113
answered 55 mins ago
forest
33k15106113
33k15106113
add a comment |
add a comment |
This is not a full answer and would be a comment but I don't have the rep. Sorry.
Why iOS asks for a pin initially is exaplined in this Black Hat talk at about 15 minutes. I naively assume Android is similar (?).
answered 1 hour ago
user8998021
11
New contributor
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
1
@JasonC Heh you're right. I saw "This is not a full answer" and then "Why [...]" and flagged as NAA.
– forest
57 mins ago
add a comment |
This is not a full answer and would be a comment but I don't have the rep. Sorry.
Why iOS asks for a pin initially is exaplined in this Black Hat talk at about 15 minutes. I naively assume Android is similar (?).
answered 1 hour ago
user8998021
11
New contributor
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
1
@JasonC Heh you're right. I saw "This is not a full answer" and then "Why [...]" and flagged as NAA.
– forest
57 mins ago
add a comment |
This is not a full answer and would be a comment but I don't have the rep. Sorry.
Why iOS asks for a pin initially is exaplined in this Black Hat talk at about 15 minutes. I naively assume Android is similar (?).
answered 1 hour ago
user8998021
11
New contributor
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
This is not a full answer and would be a comment but I don't have the rep. Sorry.
Why iOS asks for a pin initially is exaplined in this Black Hat talk at about 15 minutes. I naively assume Android is similar (?).
answered 1 hour ago
user8998021
11
New contributor
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 1 hour ago
user8998021
11
New contributor
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 1 hour ago
user8998021
11
answered 1 hour ago
user8998021
11
11
New contributor
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
user8998021 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
1
@JasonC Heh you're right. I saw "This is not a full answer" and then "Why [...]" and flagged as NAA.
– forest
57 mins ago
add a comment |
1
@JasonC Heh you're right. I saw "This is not a full answer" and then "Why [...]" and flagged as NAA.
– forest
57 mins ago
1
1
@JasonC Heh you're right. I saw "This is not a full answer" and then "Why [...]" and flagged as NAA.
– forest
57 mins ago
@JasonC Heh you're right. I saw "This is not a full answer" and then "Why [...]" and flagged as NAA.
– forest
57 mins ago
add a comment |
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Can somebody retag this if needed? I couldn't find anything more specific.
– Jason C
2 hours ago
Possible duplicate of Why do mobile devices force user to type password after reboot?
– forest
50 mins ago
I just found this duplicate. The answer explains why this is the case even with fingerprint readers.
– forest
49 mins ago