> For the complete documentation index, see [llms.txt](https://wiki.havenprotocol.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.havenprotocol.org/overview/spend-key.md).

# Spend Key

#### The Basics

One of the two pairs of private and public cryptographic keys that each account has, with the *private* spend key used to spend any funds in the account.

#### In-depth Information

The *private* spend key is a 256-bit integer that is used to sign Haven transactions. With the current deterministic key derivation method of the official wallet, the private spend key is also an alternate representation of the [mnemonic-seed](/overview/mnemonic-seed.md). It can be used to derive all other account keys.


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