Is it possible to limit the number of accounts per person, subject to free registration?

This:
hypothetical service, which can register any person.

Requirements:
Ideally some way to automatically limit one account per person.
Not necessarily strictly enough to statistically match (it was impossible to specifically create over 9000 accounts).
Preferably without the use of government/commercial ID (passport, phone numbers etc.).

Is it possible, at least theoretically? (Or Vice versa, "at least in practice?")

Formulate it differently: we need anonymous login, but with the limitation of the number of accounts per person.
July 8th 19 at 12:24
2 answers
July 8th 19 at 12:26
Depends on the task.

If you need to close some very stupid bots - you can add a captcha for registration. (will not save you from smart bots)

If that is trickier - it is necessary to indicate and to verify the identifier of the mass which is difficult, such as a phone number.

You have to understand that 100% guarantee it still does not who really need to find 5-10 phone numbers to availability.
100% guarantee gives only a offline validation of the passport.
The goal of the voting platform. That is, the goal is to protect against cheating. At the same time – with a free registration. - Jade34 commented on July 8th 19 at 12:29
: Then the social network will not work for accounts traded "beam for a Nickel". - orin.Runte commented on July 8th 19 at 12:32
in an ideal – will not work. But that came to mind at the moment is the best. - Jade34 commented on July 8th 19 at 12:35
July 8th 19 at 12:28
+
— to register through the accounts of social networks;
— offer to verify the account by credit card through the payment and return $1;
— check out the cast of the browser and machine: valve.github.io/fingerprintjs2/;
Thanks for the options!

The social network – so far, looks to be the most effective solution. But – in fact – is shifting the verification of the SOC.network, and those already verified by the same phone numbers, passports, etc., what I would like to avoid.

Bank card is not an option, because immediately cut off those who do not want them to Shine. Well, those who do not have Bank cards.

Impression of the device is also not suitable, because it is easily bypassed virtualname, and just a change of browser/device. - Jade34 commented on July 8th 19 at 12:31
: Listen to, in fact, all constraints can be circumvented. The question is, how much work will it need to spend and the balance between the accuracy requirements identification and patience of users.

So:
>> Well, those who do not have Bank cards.
Now they are not only students, in my opinion. Others are not afraid to buy on Aliexpress without 3d secure.
If the percentage of students and would in the audience of the site is small, can you ignore them?
If the content of the site does not pull to him was "Shine" card, so just ask the card number. Check it out at CRC.

The checksum can also be checked at the INN, SNILS, but you throw in the condition of such a scenario.

>> since easily bypassed virtualname, and just a change of browser/device.
If you have an audience capable dev, will she be afraid to "Shine" card? - orin.Runte commented on July 8th 19 at 12:34
: about a credit card – ideally, I would not want to use any "external" identifiers, including public and/or commercial. - Jade34 commented on July 8th 19 at 12:37
: then your not a spherical horse corresponds to the available vacuum - Jade34 commented on July 8th 19 at 12:40
well, as if it was obvious I would not ask questions to the community :) - Amanda.Dach commented on July 8th 19 at 12:43
> check the cast of the browser and machine
I'm afraid it will immediately cut off all corporate users are the admins pour absolutely identical computers.

It is still unclear what is the difference between, for example, two identical iPhone

In General, this thing solves a slightly different problem - Jade34 commented on July 8th 19 at 12:46
>> Still not clear what is the difference between, for example, two identical iPhone
Google to help - Amanda.Dach commented on July 8th 19 at 12:49

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