Random encryption method for decrypting by adopting exhaustion method

An encryption method and random key technology, which is applied in the field of random encryption, can solve the problems that password identification information cannot withstand attacks, cannot recover certificates and private keys, and is not easy to use.
CN102013980AInactive Publication Date: 2011-04-13刘海云
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
刘海云
Publication Date
2011-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a random encryption method for decrypting by adopting an exhaustion method, which is mainly used for encrypting backup keys, certificates and important documents. The random encryption method comprises the following encryption flow: inputting use identity information and encryption strength; calculating the random length of a random key and generating the random key of the random length according to the relationship among encryption strength and other factors; and encrypting the key and the certificate by using the user identity information and the random key according to the encryption algorithm to obtain backups of the encrypted key and certificate and locking the user identity information and the random key in password identification information by using the encryption algorithm determined by the program. The backups generated by the encryption method are decrypted by using the exhaustion method no matter how to write the decryption program even if the correct user identity is input; in addition, the user and the random key are required to be respectively compared. The method is not only applied to a stand-alone system, but also can be applied to key escrow services in clouds.
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Description

technical field

[0001] The invention relates to a random encryption method. The ciphertext encrypted by the encryption method needs to be decrypted by exhaustive method no matter how the decryption program is written. Background technique

[0002] The advanced EFS (Encrypting File System, Encrypting File System) is adopted in the currently commonly used operating systems Windows XP and Windows Vista. After the certificate and private key in the cryptographic system are lost, the files encrypted by EFS cannot be decrypted. The encryption strength of the private key backup exported by EFS depends entirely on the password entered by the user during the process of exporting the private key. In order to ensure the security of certificate and private key backups, people using EFS often save backups in mobile storage devices. When the certificate and private key in the operating system are lost, users often need to rummage through boxes and cabinets to find a mobile storage devic...

Claims

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