<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:  What is cryptography used for? Context: Cryptography is used to secure communication by transforming plain text into an unreadable format that can only be decrypted by authorized individuals with the correct key. Answer: [/INST]Cryptography is used for secure communication by converting plain text into an unreadable format that can only be deciphered by those with the proper key.</s>