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47results about How to "Keep Content Safe" patented technology

Secure digital appliance and method for protecting digital content

A method and apparatus for protecting digital content. A secure digital appliance is disclosed for receiving communications coupled over a communication network. A private key of a private key and public key pair is stored in the secure digital appliance in such a way that the stored private key cannot be obtained by tampering with the secure digital appliance. Upon receipt of a session initiation message that is encrypted using the public key (of the private key and public key pair) the secure digital appliance decrypts the session initiation message using the stored private key to obtain a session key. The session key is then used to decrypt communications that include encrypted digital content. The secure digital appliance includes a local output device (e.g., a TV screen and/or speakers) that is operable to provide protected output of the digital content. The secure digital appliance does not contain any provision for output other than the protected output of digital content. Because the secure digital appliance does not allow for any output of the digital content other than the protected output, the end user cannot obtain a high quality digital copy of the digital content. Therefore, there is little chance that the security of digital content will be compromised.
Owner:CISCO TECH INC

Ciphertext image deduplication method used in cloud environment and cloud server

The invention belongs to the technical field of image deduplication and discloses a ciphertext image deduplication method used in the cloud environment and a cloud server. An image in a database is partitioned, characteristic values of image blocks are calculated, and the image blocks and the characteristic values are encrypted with any one rapid symmetrical encryption algorithm; the encrypted image blocks, a sequence matrix of the image blocks and the encrypted characteristic values are uploaded to the cloud server, and ciphertext image deduplication operation is executed by the server; if other authorized users upload the image again, the encrypted image blocks and the encrypted characteristic values are required to be sent to the cloud server, the cloud server performs retrieval operation in an encrypted image library, and storage of the image blocks or deduplication is decided according to the fact that whether the same characteristic values of the image blocks or the characteristic values of the image blocks in a set threshold value range exist. On the basis of conventional image deduplication, safe deduplication of ciphertext images is realized, deduplication of different images is realized, the expected safety purpose is achieved, and besides, the storage efficiency is improved under the condition that the accuracy is guaranteed.
Owner:XIDIAN UNIV

Method, media gateway and system for transmitting content in call established via media gateway control protocol

A method for transmitting content in a call established via media gateway control protocol includes: encrypting an RFC, Request for Comment, 2833 message with a first key; and sending out the encrypted RFC2833 message. The key used for encryption and decryption may be configured in advance on a calling and a called media gateways, or be sent from a soft switch device once and for all, or be sent from the soft switch device every time when a call is initiated. The key sent from the soft switch device may be in clear text or be encrypted. The technical scheme of the present invention greatly improves the security of the content in the RFC2833 protocol transmission.
Owner:HUAWEI TECH CO LTD

Image processing apparatus and control method thereof

An image processing apparatus includes: a signal receiver configured to receive an encrypted image signal; a storage configured to temporarily store the encrypted image signal received in the signal receiver; a signal decryptor configured to convert the encrypted image signal into a decrypted image signal by decrypting the encrypted image signal output from the storage with a preset first secret key; and a decoder configured to decode the decrypted image signal output from the signal decryptor to be displayed an image.
Owner:SAMSUNG ELECTRONICS CO LTD

Method and system integrating geographical location information and bluetooth technology for relaying electronic business card

Provided in the present invention are method and system for delivering an electronic business card by combining geographical location information and Bluetooth technology. The method comprises: a requesting user submitting the current geographical location information, the name of a Bluetooth communication device, and a list of the names of other detected Bluetooth communication devices to an electronic business card delivery server by using a mobile client, acquiring a list of users corresponding to neighboring mobile clients as well as the user's condensed identity information, the neighboring mobile clients being located within a predetermined distance range and located within a detection range of the Bluetooth communication device; selecting a user from the user list, sending an electronic business card delivery request to the electronic business card delivery server; the electronic business card delivery server transmitting the request to the mobile client corresponding to the selected user, and when receiving corresponding confirmation information, responding to the request so as to deliver the electronic business card. Compared with the prior art, the present invention allows for the delivery of large quantity of electronic business cards, simplified operations, and ensured accuracy and security of electronic business card contents.
Owner:SHANGHAI HEHE INFORMATION TECH DEV
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