| 摘要 |
<p>The present invention relates to a common key management system and, in particular, to a common key management system capable of efficiently managing a common key for encrypting input data and decrypting the encrypted data. The present invention includes: a key managing unit for encrypting a pre-determined first common key for encrypting input data and decrypting the encrypted data by using a second common key; a data processing unit for extracting the first common key by decrypting the encrypted first common key by using the second common key, and encrypting the input data by using the extracted first common key; and a database for storing data encrypted by using the first common key. According to the present invention, since a common key for encrypting the input data and decrypting the encrypted data is encrypted and then independently managed, it is effective at tightening the security of the common key.</p> |
