<p>Using the extended public key one could derive all of the addresses associated with your wallet. This would allow someone to determine future and current addresses in your wallet, this could allow someone to monitor your financial activities. I'm not sure how they could disrupt access to your wallet. I believe it functions similar to a HD wallet public key.</p>

CC BY-SA 3.0
2016-04-10T01:13:44.423Z
2016-04-10T01:13:44.423Z
Mark S.
<p>I recently signed up on blockchain.info and on the <em>manage addresses</em> section I can see my wallet <strong>Extended Public Key (xPub)</strong>. There is a warning message saying:</p>

<blockquote>
  <p>You should only give this Extended Public Key (xPub) to those you
  trust. With this information, they may be able to keep track of your
  payments, and may be able to disrupt your access to your wallet.</p>
</blockquote>

<p>I'd like to know how this works. How could someone keep track of payments that a wallet receives and sends if he knows it's Extended Public Key?</p>

<wallet><address><blockchain.info><public-key>
How to track bitcoin wallet activity with extended public key?
Marco
# How to track bitcoin wallet activity with extended public key?

(Asked by: username_0 on 2016-04-09)

I recently signed up on blockchain.info and on the *manage addresses* section I can see my wallet **Extended Public Key (xPub)**. There is a warning message saying:

> You should only give this Extended Public Key (xPub) to those you
> trust. With this information, they may be able to keep track of your
> payments, and may be able to disrupt your access to your wallet.

I'd like to know how this works. How could someone keep track of payments that a wallet receives and sends if he knows it's Extended Public Key?

**Tags:** wallet, address, blockchain.info, public-key


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## 1 answers

### Answer by username_1 on 2016-04-10. Score: 1 | Accepted answer

Using the extended public key one could derive all of the addresses associated with your wallet. This would allow someone to determine future and current addresses in your wallet, this could allow someone to monitor your financial activities. I'm not sure how they could disrupt access to your wallet. I believe it functions similar to a HD wallet public key.


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