首页>
外国专利>
Enciphering/deciphering device and method, and encryption/decryption communication system
Enciphering/deciphering device and method, and encryption/decryption communication system
展开▼
机译:加密/解密装置和方法,以及加密/解密通信系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
A plaintext file 41 is enciphered using a file key 44, to generate ciphertext 42. The file key 44 is enciphered using a secret key 47 and a management key 48, respectively, to form an enciphered key 1 (45) and an enciphered key 2 (46). An enciphered file 43 is produced from the ciphertext 42, the enciphered key 1 and the enciphered key 2. At the time of decryption, the enciphered key 1 is taken out from the enciphered file 43. The enciphered key 1 taken out is deciphered using a secret key 47, to obtain a file key 44. The ciphertext 42 is deciphered using the file key 44, to obtain the plaintext 41.
展开▼