Unknown reporter writes

the command "apt-get update" on debian jessie give me this message

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://www.lesbonscomptes.com jessie InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 7808CE96D38B9201

medoc writes

You need to download and install the keys: https://www.lesbonscomptes.com/pages/signatures.html

dvdbnnfs writes

That’s ok. Thank you.