> For the complete documentation index, see [llms.txt](https://contracts.synapseprotocol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://contracts.synapseprotocol.com/elin/contracts/cryptography/ecdsa.md).

# ECDSA

*Elliptic Curve Digital Signature Algorithm (ECDSA) operations. These functions can be used to verify that a message was signed by the holder of the private keys of a given address.*