Abstract: The present invention relates to a computer-implemented method, system and computer readable medium for searching over encrypted keywords in a database. The method includes the steps of generating at least one keyword, generating a plurality of different encrypted keywords corresponding to the keyword, storing the at least one encrypted keyword in the database, generating a plurality of different trapdoors for the keyword, verifying the plurality of different trapdoors with the plurality of different encrypted keywords corresponding to the keyword, and determining the keyword is found if the plurality of different trapdoors match with one the encrypted keyword corresponding to the keyword, otherwise determining the keyword is not found.

Abstract: A method, device and non-transitory computer readable medium for scene based video watermarking. Methods are disclosed to detect the scenes inside the video. Disclosed devices and methods are capable of scene change detection for both, gradual and abrupt scenes. Methods are also disclosed to group logical scenes in a video. The disclosed methods are aided with methods to reduce the computational time taken for scene change detection. Watermarks are created and segmented using a plurality of unique identifiers to limit any unauthorized use of the video.

Abstract: A method and system for a multi-user searchable encryption system over ordered keywords is disclosed. The system includes a key generation server which issues a primary key to a user terminal device and a secondary key to a proxy server. A trapdoor is sent by the user terminal and received by the proxy server. The trapdoor is encrypted at the proxy server. The proxy server receives cypher text from the user terminal and sends the cypher text to the database server. A search keyword inputted by the user at the user terminal is used to perform a lookup in encrypted data.

Abstract: An embodiment for securely accessing services of a service provider based on single sign on. The user device is authenticated by an authentication server if the computed hash of the first random number r is same as the received hash of the first random number r sent by a user device. Thereafter, the second random number y, the user id and an element Q are encrypted using a service provider password and send to the service provider. The user device computes a first discrete exponential function Z using the element Q and the second random number y and sends along with the user id to the service provider. The service provider computes a second discrete exponential function Z? using the element Q and the second random number y received from the authentication server and provides the user device access to the services if Z is equal to Z?.

Abstract: The geometric distortions of videos and images are corrected wherein a plurality of geometrically distorted frames are mapped with a plurality of original frames of the video content. Further, one or more features associated with the mapped frames are identified as insensitive to the one or more geometric distortions. One or more features of the mapped frames are further mapped with original frames based on a predefined similarity threshold and thereafter one or more geometric distortion parameters are determined. Furthermore, a frame level average distortion and a video level average distortion of each of the one or more geometric distortion parameters are determined, based on which the one or more geometric distortions of the video content are corrected.

Abstract: The present invention relates to a computer-implemented method, system and computer readable medium for embedding a watermark into a video and extracting a watermark from the original or copy of the watermarked video. The method comprises converting a video frame from RGB color space to YUV color space. Divide a chrominance component into plurality of blocks. Select plurality of blocks based on size of watermark. Associate a pixel in the watermark with selected plurality of blocks. Embed the watermark corresponding to selected plurality of blocks wherein embedding comprises replacing a first pixel value of the block with maximum value of first column of the block if binary value of the corresponding watermark pixel is one or else replace with minimum value. Combine Y component and chrominance components resulting processed YUV video frame and convert it to RGB video frame. Extract the watermark substantially in a reverse process.

Abstract: A method, non-transitory computer readable medium, and video analyzing computing device that generates a scene averaged frame value for each scene of an original video and a each scene of a resembling video. Each of a subset of the scenes of the resembling video is mapped to a corresponding scene of the original video based on a comparison of the scene averaged frame values. A singular value score is generated for each frame of each of the subset of scenes of the resembling video and each frame of the corresponding one of the scenes of the original video is generated. Matching one(s) of the one or more frames of each of the at least a subset of scenes of the resembling video is identified based on a comparison of at least a subset of the singular value scores. A first watermark is extracted from the identified matching frames.

Abstract: Method, apparatus and non-transitory computer readable medium for embedding and extracting a watermark in a text document using digital watermarking processes is disclosed. When the text document is watermarked, the following steps are performed. The pages of the text document are transformed into corresponding images. Then, the margins on each of the images are detected and cropped to generate the cropped images. The cropped images are segmented into blocks among which some blocks are selected based on content of each block. The watermark is embedded in the selected blocks using a digital watermarking process. When the watermark from the watermarked text document is extracted, the watermark-embedding process is referred to determine the block information, for selecting each block of a watermarked text document, from where the watermark needs to be extracted.

Abstract: A method and system for a multi-user searchable encryption system over ordered keywords is disclosed. The system includes a key generation server which issues a primary key to a user terminal device and a secondary key to a proxy server. A trapdoor is sent by the user terminal and received by the proxy server. The trapdoor is encrypted at the proxy server. The proxy server receives cypher text from the user terminal and sends the cypher text to the database server. A search keyword inputted by the user at the user terminal is used to perform a lookup in encrypted data.

Abstract: The technique relates to a system and method for correcting geometric distortions in videos and images. To correct the one or more geometric distortions in videos, the frames of the original and distorted video are mapped at the beginning and then the features associated with the mapped frames which are insensitive to geometric distortions are identified. In case of correcting geometric distortions in images, frame mapping is not required and thus the process starts from identifying the features insensitive to geometric distortions in the original image and distorted image. Then, the geometric distortion parameters are identified from the mapped features. After that, a frame level and video level average distortion of the geometric distortion parameters are determined. Finally, the geometric distortions are corrected based on the frame level and video level average distortion value.

Abstract: A method, non-transitory computer readable medium, and video analyzing computing device that generates a scene averaged frame value for each scene of an original video and a each scene of a resembling video. Each of a subset of the scenes of the resembling video is mapped to a corresponding scene of the original video based on a comparison of the scene averaged frame values. A singular value score is generated for each frame of each of the subset of scenes of the resembling video and each frame of the corresponding one of the scenes of the original video is generated. Matching one(s) of the one or more frames of each of the at least a subset of scenes of the resembling video is identified based on a comparison of at least a subset of the singular value scores. A first watermark is extracted from the identified matching frames.

Abstract: A method, device and non-transitory computer readable medium for scene based video watermarking. Methods are disclosed to detect the scenes inside the video. Disclosed devices and methods are capable of scene change detection for both, gradual and abrupt scenes. Methods are also disclosed to group logical scenes in a video. The disclosed methods are aided with methods to reduce the computational time taken for scene change detection. Watermarks are created and segmented using a plurality of unique identifiers to limit any unauthorized use of the video.

Abstract: A method, system and computer-readable media for detecting scene changes in a video that includes providing by one or more computing devices a plurality of passes through the video where a plurality of detected scenes from a first pass in a conventional method are identified and a second pass through the detected scenes are provided by the computing device. A plurality of scene boundary differences corresponding to the detected scenes, a fixed average, and a varying average are computed by the computing device. The scene boundary difference is compared with the fixed average and the varying average and if the scene boundary difference is less than the fixed average and the varying average, the detected scenes are combined else the detected scene being an abrupt scene change is determined. The steps of computing a varying average to combining the detected scenes are repeated by the computing device.

Abstract: A method for performing transcoding resistant watermarking of digital media content is provided. The method enables obtaining a plurality of spectral frequency bands of the digital media content. The method further enables calculating an entropy value for each of the plurality of spectral frequency bands. The entropy value quantifies information in each of the plurality of spectral frequency bands. The method further enables selecting a spectral frequency band from amongst the plurality of spectral frequency bands based on the calculation. The selected spectral frequency band has the highest entropy. Furthermore, the method enables inserting a watermark in the selected spectral frequency band of the digital media content.

Abstract: The present invention relates to a computer-implemented method, system and computer readable medium for providing a searching over encrypted keywords in a database. The method comprises the steps of generating at least one keyword, generating a plurality of different encrypted keywords corresponding to said keyword, storing said at least one encrypted keyword in said database; generating a plurality of different trapdoors for said keyword, verifying said plurality of different trapdoors with said plurality of different encrypted keywords corresponding to said keyword and determining said keyword if said plurality of different trapdoors match with one said encrypted keyword corresponding to said keyword else determining said keyword is not found.

Abstract: Embodiments of the present invention provide a mobile device comprising a core phone with a detachable primary device. The core phone transfers an incoming call alert to the detached primary device by synchronizing the display frame buffer of the core phone with the display frame buffer associated with the detached primary device. A plurality of remote secondary devices can be paired with the core phone on request by said secondary devices to transfer an incoming call alert to said plurality of secondary devices and establish a connection after authorization with said detached primary device. The detachable primary device is usable by pairing with the core phone when the core phone is not used directly but remains in the vicinity. Important data in the primary device is synchronized with the core phone to avoid data loss when the primary device is accidentally dropped or lost or damaged.

Abstract: An embodiment for securely accessing services of a service provider based on single sign on. The user device is authenticated by an authentication server if the computed hash of the first random number r is same as the received hash of the first random number r sent by a user device. Thereafter, the second random number y, the user id and an element Q are encrypted using a service provider password and send to the service provider. The user device computes a first discrete exponential function Z using the element Q and the second random number y and sends along with the user id to the service provider. The service provider computes a second discrete exponential function Z? using the element Q and the second random number y received from the authentication server and provides the user device access to the services if Z is equal to Z?.

Abstract: Embodiments of the present invention provide a mobile device comprising a core phone with a detachable primary device. The core phone transfers an incoming call alert to the detached primary device by synchronizing the display frame buffer of the core phone with the display frame buffer associated with the detached primary device. A plurality of remote secondary devices can be paired with the core phone on request by said secondary devices to transfer an incoming call alert to said plurality of secondary devices and establish a connection after authorization with said detached primary device. The detachable primary device is usable by pairing with the core phone when the core phone is not used directly but remains in the vicinity. Important data in the primary device is synchronized with the core phone to avoid data loss when the primary device is accidentally dropped or lost or damaged.

Abstract: The present invention relates to a computer-implemented method, system and computer readable medium for embedding a watermark into a video and extracting a watermark from the original or copy of the watermarked video. The method comprises converting a video frame from RGB color space to YUV color space. Divide a chrominance component into plurality of blocks. Select plurality of blocks based on size of watermark. Associate a pixel in the watermark with selected plurality of blocks. Embed the watermark corresponding to selected plurality of blocks wherein embedding comprises replacing a first pixel value of the block with maximum value of first column of the block if binary value of the corresponding watermark pixel is one or else replace with minimum value. Combine Y component and chrominance components resulting processed YUV video frame and convert it to RGB video frame. Extract the watermark substantially in a reverse process.

Abstract: The present invention relates to a computer-implemented method, system and computer readable medium for detecting source of leakage of a video. The method comprises processing a video by a processing device resulting a processed video, identifying at least one responsible user for safekeeping and/or distributing and/or screening the processed video, creating a watermark wherein the watermark comprises an information about an owner of the video, the responsible user, and at least one transaction information, embedding the watermark inside the processed video resulting a watermarked video, distributing the watermarked video to at least one consumer, and identifying the responsible user by extracting the watermark from a pirated copy of the watermarked video and extracting the information contained in the watermark from the watermarked video.