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username • password public • private detachable • non-detachable unique • arbitrary A name has to be unique. But it can simultaneously be us
by techno_modus 9y ago
username • password
public • private
detachable • non-detachable
unique • arbitrary
A name has to be unique. But it can simultaneously be used as a password if it is impossible to detach (copy) it and associate with another thing. One way to do it is to simply hide it like private keys and normal passwords but in this case it cannot be used as a name. An alternative approach is to make it difficult to copy/reproduce (similar to normal car or house keys). In the case of fingerprints, they can well be used as a password (in addition to its role as a name) until it is impossible to create artificial fingers and attach them to other persons.
- Phemist 9y agoFingerprints are not private though, so they fail your very first criterium of passwords. Fingerprints are also not arbitrary[1], it is possible to combine two (or more) fingerprints resulting in a new "fingerprint" in its own right, as well as being a fingerprint that is similar enough to the two (or more) original fingerprint to have a high chance of fooling most sensors on smart phones for all fingerprints involved. Also, uniqueness vs. arbitrariness smells like a false dichotomy to me. Something can be both arbitrary and unique (see for example uuids). [1] - https://www.nytimes.com/2017/04/10/technology/fingerprint-security-smartphones-apple-google-samsung.html https://www.nytimes.com/2017/04/10/technology/fingerprint-se...