Matching Pairs Secret WritingOnline version ........... by Tea Cher 1 Steganography 隐写术 2 Vital information 重要信息 3 Cunning 狡猾 4 Scalp 头皮 5 Substitution 代换 6 Secret agent 密探 7 Cryptography 密码学: 8 Alum 明矾 9 Ancient 古老的 10 Transposition 换位 A chemical compound used for various purposes, including as a mordant in dyeing and as an ingredient in some inks. The act of replacing one thing with another. The act of changing the position or order of something. Critical or essential information that is of utmost importance. The practice of concealing messages or information within other non-secret data. A person who works covertly to gather information or perform espionage activities. Clever, sly, or crafty in achieving one's goals or solving problems. The practice or study of techniques for secure communication in the presence of third parties. The skin covering the top of the head. Belonging to a time long past, typically referring to a period in history.
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