# Security To ensure the security of all stakeholders of the network, Bifrost implements several lines of defense. Socket contracts and relayers play a major role. All relayers must sign the message with their private key in every message handling. The Bifrost Network should accept messages of valid relayers by verifying the message signature. * Every socket contract verifies the signed message to check whether or not the message is from valid relayers. Relayers and socket contracts perform sanity checks for every Cross-Chain Communication (CCC) message at each stage. * If an Ethereum transaction related to the CCC job is not executed for a long time, the network identifies the transaction and then runs a corresponding action, such as transaction rollback. * The network is able to identify the message which falls under abnormal situations (e.g. transaction revert and transaction pending for a long time). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.bifrostnetwork.com/bifrost-network/security.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.