What characteristic must an electronic stamp and signature exhibit regarding tampering?

An electronic stamp and signature must exhibit tamper-evident characteristics to ensure the integrity and authenticity of the document. When a signature is affixed to a document in a tamper-evident manner, it means that any attempt to alter or modify the document after the signature has been added can be easily detected. This is critical for maintaining trust in electronic transactions, as it assures all parties involved that the content has not been changed since it was signed.

Tamper evidence is achieved through various methods, such as using cryptographic techniques or secure software solutions that log any changes made to the document after signing. This characteristic protects against fraud and unauthorized alterations, which is essential for legal and business documents that require notarial acts.

In contrast, characteristics like being easy to alter or removable for updates could compromise the document's integrity, creating opportunities for misuse and reducing the level of trust that can be placed in the signed document. The visibility of the stamp or signature is also important, but it does not specifically address the need for protection against tampering. Therefore, the requirement for a tamper-evident attachment is crucial in validating the security of electronic documents and signatures.