How to disable the Master key
Disabling the Master key on an XRPL account
Why disable the Master key?
There are two main reasons why you would want to disable the Master key for an XRPL account:
Your account has been compromised
You want to configure your account so that you can only sign and submit transactions using a regular keyed account.
Before you get started
You should confirm that you have the correct account secret for your account.
How to test your Account Secret
Once you have done this, you should be aware of the following before you proceed:
1) To disable the master key pair, you must use the master key pair.
2) Your account must have at least one method of authorizing transactions other than the master key pair. e.g. - assign a regular key
3) Once the Master key has been disabled, you will not be able to use it to re-enable your Master key. It can only be re-enabled using the assigned regular key account.
Make sure you configure a Regular key account
The XRP Ledger will not let you disable the Master key unless there is an alternate way to sign and submit transactions. This article explains how to do this by adding a regular key to your account.
Disabling your Master key
You will not be able to access your XRP Ledger account using your Master key after performing this procedure. Ony your regular key account will be able to sign and submit transactions to the XRPL.
1) Go to XRPL.services
2) Press the 
button then press Open in Xumm App and sign in with the account the you would like to disable your Master key for.
5) On the XRP Ledger Services page, select Account Set.
6) Choose Disable Master Key, then press the Send Account Settings to Xumm button.
7) Sign the transaction in Xaman (formerly Xumm) and you're all done!
8) Your Master Key should now be disabled and you should now be able to send and submit transactions to the XRP Ledger exclusively using your Regular key account.
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