# Quiz 48 What is the primary reason BSV uses double hash functions? **Type all answers and select the correct one** * [x] To facilitate a separation of concerns within the system * [ ] To increase security against birthday attacks * [ ] To reduce the likelihood of hash collisions * [ ] To simplify the proof-of-work process **Note to Learners** BSV uses double hash functions to facilitate a \*\*separation of concerns\*\* within the BSV system and add usability and extensibility. To learn more about it, you can follow the course [Double Hashing and BSV's Security](https://bsvblockchain.360learning.com/course/play/68bead673b7af35da91fc446) --- # 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-hash-functions/quiz-bitcoin-hash-functions/quiz-48.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.