How to make a single address for every individual ? (300,000+)

[cowsgomoo]

Hello, apologies first, English is not my first language.
We want to raise ethereums for our project (ICO).
We want it to make individual address for every single person who registers on the website

so that we can know who sent the ethereum when we get them.
If address XXX is assigned to person A, and if we get eth in that address,
we would know that A sent eths.

Could anyone tell me how one does this please?
Any reference? How can one manage a LARGE number of wallet addresses?

[AGD]

What has this to do with Bitcoin? 

[Xynerise]

This has nothing to do with bitcoin.
Anyways it's far better to deploy a smart contract that sends the ERC 20 token to the address that sends ETH to it in proportion to the amount sent.
You can see a sample contract on https://www.ethereum.org/crowdsale

[Random Seller]

I’m guessing that there should be a implementation for xpub for Ethereum.

You could use that xpub to generate the required addresses programmatically, than tie them to each user on your db.

I would also check the db each time after generating a pubk just to be absolutely sure there’s no duplicates.