<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 concept of multi-factor authentication in computer security. Context: Multi-factor authentication involves verifying users' identities through more than one method, such as a password, fingerprint, or security token. Answer: [/INST]It requires users to verify their identity through more than one method, such as a password, fingerprint, or security token.</s>