# Unlinkable Transactions

Normally, when you post your public address, anyone can check all your incoming transactions even if they are hidden behind a ring signature. To avoid linking you can create hundreds of keys and send them to your payers privately, but that deprives you of the convenience of having a single public address.

![](/files/-M-SO9wkJNrUxwiqc3DB)

Scala’s CryptoNote solves this dilemma by an automatic creation of multiple unique one-time keys, derived from the single public key, for each p2p payment. The solution lies in a clever modification of the Diffie-Hellman exchange protocol. Originally it allows two parties to produce a common secret key derived from their public keys. In our version the sender uses the receiver’s public address and his own random data to compute a one-time key for the payment.

The sender can produce only the public part of the key, whereas only the receiver can compute the private part; hence the receiver is the only one who can release the funds after the transaction is committed. He only needs to perform a single formula check on each transactions to establish if it belongs to him. This process involves his private key, therefore no third party can perform this check and discover the link between the one-time key generated by the sender and the receiver’s unique public address.

An important part of our protocol is usage of random data by the sender. It always results in a different one-time key even if the sender and the receiver both remain the same for all transactions (that is why the key is called “onetime”). Moreover, even if they are both the same person, all the one-time keys will also be absolutely unique.

![](https://gblobscdn.gitbook.com/assets%2F-LV59Y28GtFOLyQ3_Vax%2F-M-SOGBFYztWGzGlrc97%2F-M-SPELa0GDjueBZnep0%2FScala%20Wiki%20Unklinkable%20Transactions%20Remake%202.png?alt=media\&token=20167e4f-10dd-42f2-baea-02e81e67906f)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://wiki.scalaproject.io/specifications/feature-desc/unlinkable-transactions.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.