> For the complete documentation index, see [llms.txt](https://docs.zkbob.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zkbob.com/implementation/account-and-notes.md).

# Accounts and Notes

A set of accounts and notes implement the base functionality of private transactions. The Merkle tree is built from them. They are arranged in a strictly ordered sequence and represent tree leafs. A new account state is added to this sequence to update the account balance.

* [Accounts](/implementation/account-and-notes/accounts.md) contain information about a user's wallet which can only be decrypted by the owner.
* [Notes](/implementation/account-and-notes/notes.md) specify a user's available assets. They are also encrypted and can only be accessed by the sender or receiver.​