Data access control device and data access control method

TL;DR: In this article, a data processing method and a device are provided for sending, by a first communication device, a video communication request to a second communication device; receiving a first response identifier corresponding to the video communications request, where the first response identifiers is adapted to identify that the first communication devices failed to communicate with the second communication devices in response to video communication requests.

TL;DR: In this paper, the authors proposed a certificate processing method and terminal, which comprises the first step of collecting certificate information, performing encryption on the certificate information through a preset encryption strategy and storing the certificates into a database, and the second step of managing and using the certificates in the database based on an authentication strategy corresponding to the encryption strategy.

TL;DR: In this article, an object encryption storage method, device and system is described, which includes: acquiring a storage request which carries a data object; acquiring the encryption attributes corresponding to the storage request; encrypting the attribute data requiring encryption in the data object to obtain the encrypted object; saving the encrypted objects in a database.

TL;DR: In this paper, the authors proposed a data item level database encryption method, where a hash function is used for deriving an encryption key of each data item according to a derived key and unique positioning information of the data item, even the data items encryption keys for encryption of all integral databases can be derived by using one key to reduce the using amount of the keys and facilitate key management.

TL;DR: In this paper, a database information encryption method and an information security system using the same technology belong to the technical field of information security, and the method comprises the following steps of: encrypting a sensitive field in a datasheet through a cryptoequipment unit, and creating a homonymous view which points to the encrypted datasheet for the sensitive field; maintaining the use permission of a user to a key, and encrypting the used cryptoe-quipment units, an encryption mode and the key; allowing a user with the permission to successfully read and modify encryption information;