CAdES

CAdES (CMS Advanced Electronic Signatures) is a standard used to securely sign digital documents, ensuring their authenticity, integrity, and non-repudiation. It builds on digital signatures, adding features that allow signatures to remain valid over time, even if the document or technology changes. CAdES is commonly used in legal, financial, and governmental contexts to verify that a document hasn't been altered and that it was signed by the claimed individual or organization. Think of it as a digital stamp of trust that preserves the document's validity for future reference.