# Quiz 17 #### What are the benefits of using deterministic ephemeral keys in ECDSA? * [x] Same message always produces the same signature * [x] Reduces reliance on randomness quality * [x] Standardized by RFC 6979 * [ ] Increases randomness in signatures * [ ] Makes signatures non-reproducible **Note to Learners** Using deterministic ephemeral keys ensures the same message always produces the same signature. This property makes ECDSA non-deterministic. To standardize behavior, some systems use deterministic ephemeral keys, generated with an HMAC of the private key and the message. For details, see RFC 6979. To learn more about it, you can follow the course [Elliptic Curve Digital Signature Algorithm (ECDSA)](https://bsvblockchain.360learning.com/course/play/68dcfb7db22b823a03f88909) --- # 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-17.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.