Relier Pairs Secret WritingVersion en ligne ........... par Tea Cher 1 Cunning 狡猾 2 Secret agent 密探 3 Substitution 代换 4 Cryptography 密码学: 5 Alum 明矾 6 Vital information 重要信息 7 Steganography 隐写术 8 Transposition 换位 9 Scalp 头皮 10 Ancient 古老的 Belonging to a time long past, typically referring to a period in history. The practice or study of techniques for secure communication in the presence of third parties. 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 changing the position or order of something. Critical or essential information that is of utmost importance. The skin covering the top of the head. The act of replacing one thing with another. A person who works covertly to gather information or perform espionage activities.