<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Describe the purpose of access control in computer security. Context: Access control in computer security ensures that only authorized users have access to specific resources and data. Answer: [/INST]It ensures that only authorized users have access to specific resources and data.</s>