<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:  Summarize the purpose of data masking. Context: Data masking is used to protect sensitive data by replacing it with fake but realistic looking data. Answer: [/INST]It helps protect sensitive data by replacing original data with fake but realistic looking data.</s>