翻译，把下列句子翻译成汉语：1、We mentioned the CIA triad: confidentiality, integrity and availability.2、A virus is a program that embeds a copy of itself and inserts those copies into other programs. 3、A worm is a type of virus that uses a network to copy itself onto other computers.4、Cryptography is the study of mathematically encoding and decoding messages.5、Symmetric-key cryptography uses the same cryptographic keys for both encryption of plaintext and decryption of ciphertext.6、In asymmetric key cryptography, each user has a pair of keys that are related mathematically.7、Hash functions, also called one-way encryption or message digests, are algorithms that use no key.8、Quantum cryptography is the science of existing knowledge of physics and quantum mechanics to perform cryptographic tasks in a secure cryptosystem.9、Steganography is the science of concealing information.