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