I had a different post that didn’t really answer your question. A real answer is that it might not be as much of a problem as you might imagine. Biometric verification is really insecure: something like a 1% false positive rate for fingerprints.
Ideally people would just use passwords like back in the olden days. Longer strings are more secure than random characters.
- fingerprints are not genetic, but are formed by the movement of the fetus in the womb. while they are not a reliable way to identify someone out of a general population (the likeness is about 1:10000; there have been wrongful convictions based off of fingerprint data) they can be used to differentiate two individuals.
- almost everyone has some insignificant scarring on the hands or face that’s created after birth and which is tied to some stupid story about cutting cheese or whatever.
- everyone has some weird fetish. if you don’t think your fetish is weird, it’s because you’re in company that shares it.
I have a hardware key, that’s probably secure enough. 128 bits of unique data.
My doppelganger will provide PII before I do
Whichever one folds and tells you an actual identifying characteristic first is the fake
The inquisitor sighs in exasperation.
“It’s been 36 hours. You’ve each had one granola bar and a bottle of Pepsi since you got here. At some point, one of you has to prove you’re real.”
Left Starman says “I invoke the 5th.”
Right Starman says “I want a lawyer.”
"You’re not under arrest! We’re just trying to figure out which one of you is real. You gotta give us something.
Both Starmen simultaneously state “I don’t talk to police.”
The interrogation continues for a further 17 hours before Left Starman gives in. “My cat’s name is Iris, you can call my roommates and verify it.”
“You dumb son of a bitch,” Right Starman says, “that’s just what I tell people online.”
BLAM
I’ve had several occasions where I’ve seen doppelgangers out in public in my city but I’m 99% sure this is because I was a sperm donor baby. It was totally anonymous in the early 90s.
Could do one of those DNA test things but I have less than 0 interest in meeting a bunch of half siblings. Sounds messy. Already got two parents who I’m happy with.
I feel like one day, the offsprings of the sperm doner is gonna end up have kids with one another, and that’s gonna be… well um… Alabamian 👀
Yeah kinda solved that issue by marrying someone from another country
You authenticate either with something that you have (physical key, for example), something that you know (passwor for example), or something that you are (biometrics, basically).
Dopplegangers rule out that last one, but the previous two still work fine
“Something you have” is not exactly a good way to authenticate. Once they steal it, they can assume your identity (see: ID Theft)
That also goes for what you are. Biometric security has been rendered nearly useless since everybody and their mother started using it without giving a single shit about securing that data
I’m the one with a slightly fucked up left arm
I’m already an identical twin and it’s a nightmare even having a different first and middle name but same everything else.
I think we’re just living with a second set of identical twins?
Relevant XKCD: https://xkcd.com/1121/
Some years back I was in a D&D campaign where doppelgangers became a major ongoing concern. It turned out that in that case doppelgangers built up their image of the person they wanted to mimic through careful observation, but thanks to the general prudishness of society doppelgangers rarely ever caught glimpses of peoples’ genitals. So we ultimately came up with the “crotch check” system. Doppelgangers usually couldn’t form plausible genitalia.
This is the most D&D campaign thing I’ve ever heard, no further questions
Does my doppelgänger go to my workplace and do my job?
If not, there’s your answer.
If he does, I leave him to it and go read a book in the park.
Congrats, your doppelganger goes to your job and gets you fired. The monkey’s paw strikes again.
In that case, that’s the giveaway
Don’t let my boss know that I know this.
Simple. I kill my doppelgänger, if he wins he wanted it more.
There could be only one Rusty Shackleford.
…Dwight?
Same as I do now, passwords. Unless they inherited my memories, in which case who’s to say I’m not the doppelganger?
Lol, I think passwords are very trival to get.
I mean, they got the ability to look like you, you gotta assume they can get CCTV footage of you typing your passwords.
I don’t see how looking like me would help them get CCTV footage, unless it’s through some sort of supernatural means. And even if they could find footage of me entering a password, they’d be hard-pressed to extract individual keystrokes from a typical CCTV quality recording. Perhaps it’s technically possible, but it’s certainly not trivial.
Nice try, Doppelganger!
Save it for queen dopplepopolis!
I dub thee Sir Phobos, Beater of Ass.
I’d sign a payload using my private key that my doppelganger doesn’t have.
