# Quiz 1 #### Which of the following are properties of digital signatures that make them more secure than physical signatures? * [x] Tamper resistance * [x] Non-repudiation * [ ] Vulnerability to forgery * [ ] Manual verification by a third party **Note to learners** Digital signatures provide critical protections, including: \*\*Tamper resistance\*\* – ensuring data is not altered after signing. \*\*Impersonation prevention\*\* – proving the identity of the sender. Since \*\*kpr\*\* is known only to Alice: She cannot later deny that she signed the message. This prevents dishonest senders from \*\*repudiating\*\* (denying) their actions. To learn more about it, you can follow the course [What are Digital Signatures](https://bsvblockchain.360learning.com/course/play/68dba6e4aaed24fbae97d69e) --- # 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://hub.bsvblockchain.org/higher-learning/bsv-academy/bitcoin-primitives-digital-signatures/quiz/quiz-1.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.