摘要:
A method for sharing and updating a key using a watermark is disclosed. The method includes receiving an image to be encoded from an image input device encoding the image, and inserting a master key value as a watermark into the encoded image, for use as an input of a key derivation function.
摘要:
A method for sharing and updating a key using a watermark is disclosed. The method includes receiving an image to be encoded from an image input device encoding the image, and inserting a master key value as a watermark into the encoded image, for use as an input of a key derivation function.
摘要:
A security management server includes an input unit for receiving image data from at least one network camera; a control unit for assigning an access authority level to each image data received via the input unit; and a storage unit for storing therein the image data along with the access authority levels assigned by the control unit. When receiving a request for a specific image data among the image data stored in the storage unit from a user having a user access authority level, the control unit compares the user access authority level and the access authority level assigned to the specific image data, and based on comparison result thereof, selectively provides the specific image data to the user.
摘要:
An apparatus for creating a surveillance image with event-related information includes an event detection unit configured to detect an event in the surveillance image, an encoding unit configured to encode the surveillance image into a bit stream of the surveillance image, an event information creation unit configured to create event-related information based on the detected event, and a parsing unit configured to parse the encoded surveillance image and insert the event-related information into the bit stream of the encoded surveillance image.
摘要:
There is provided a security video transmission apparatus for generating and updating an encryption key by using video data, having a property of a random number which is continuously generated in real time, as random number data in order to generate a key, encrypting the video data using the encryption key, and then transmitting the encrypted video data.
摘要:
An apparatus for hash cryptography has a hardware structure that is capable of providing both secure hash algorithm (SHA)-1 hash calculation and SHA-256 hash calculation. The apparatus for hash cryptography generates a plurality of first message data corresponding to a plurality of first rounds when the SHA-1 hash calculation is performed and generates a plurality of second message data corresponding to a plurality of second rounds when the SHA-256 hash calculation is performed by using one memory, one first register, one XOR calculator, and one OR calculator, calculates a message digest by the SHA-1 hash calculation by using the plurality of first message data when the SHA-1 hash calculation is performed, and calculates a message digest by the SHA-256 by using the plurality of second message data when the SHA-256 hash calculation is performed.