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