Abstract: A method for a testing system to perform fuzzy testing of a software system, wherein the software system comprises a plurality of callable units and is arranged to receive input for the software system to process, the method comprising: determining, for each callable unit of the plurality of callable units, based on one or more security vulnerability metrics, a target number of times that callable unit is to be tested; initializing a ranked plurality of queues, each queue for storing one or more seeds, said initializing comprising storing one or more initial seeds in a corresponding queue of the ranked plurality of queues; performing a sequence of tests, wherein performing each test comprises: obtaining a seed from the highest ranked non-empty queue; performing a mutation process on the obtained seed to generate a test seed, wherein the mutation process is configured, at least in part, by mutation guidance information; providing the test seed as input to the software system for the software system to process;

Abstract: Methods and systems for providing secure digital access to services are described. Embodiments include user behavior tracking, learning, and updating one or more contextual access algorithms and thereafter can act as multi-factor authentications. The method may include receiving data for a group of users and initializing a machine learning algorithm with the group data. The method may also collect individual user data and context data periodically, including characteristic behavior data, and update the machine learning algorithm with the individual user data. The method may further calculate a threshold for tolerance based on the updated algorithm, and verify user requests for access to the service. A multi-factor authentication may be presented to the user when the verifications are not acceptable, such as by being below a threshold. A permissions data structure can be generated and used to control access to the service.

Abstract: There is disclosed heat pump, comprising: an internal heat exchanger configured to transfer heat from refrigerant in a liquid line pathway to refrigerant in a suction line pathway, to superheat the refrigerant upstream of a compressor; and a controller configured to: control an expansion valve to maintain a target superheat of refrigerant at a control location. The target superheat is variable and is determined based on one or more operating conditions of the heat pump. There is also disclosed a method of operating a heat pump and a simulation method to determine a variable superheat.

Abstract: Disclosed implementations include a depth generation method using a novel teacher-student GAN architecture (TS-GAN) to generate depth images for 2-D images, such as RGB images, where no corresponding depth information is available. An example model consists of two components, a teacher and a student. The teacher consists of a fully convolutional encoder-decoder network as a generator along with a fully convolution classification network as the discriminator. The generator takes 2-D images as inputs and aims to output the corresponding depth images. The teacher learns an initial latent mapping between 2-dimensional and co-registered depth images and the student applies the latent mapping to provide feedback to the classification network for refinement.

Abstract: System and methods may be used for arc fluence optimization without iteration to arc sequence generation. A method may include defining a particle arc range for a radiotherapy treatment of a patient, and generating an arc sequence, including a set of parameters for delivering the radiotherapy treatment, without requiring a dose calculation. The method may include optimizing fluence of the arc sequence for the radiotherapy treatment without iterating back to arc sequence generation, and outputting the fluence optimized arc sequence for use in the radiotherapy treatment.

Abstract: System and methods may be used for arc fluence optimization without iteration to arc sequence generation. A method may include defining a particle arc range for a radiotherapy treatment of a patient, and generating an arc sequence, including a set of parameters for delivering the radiotherapy treatment, without requiring a dose calculation. The method may include optimizing fluence of the arc sequence for the radiotherapy treatment without iterating back to arc sequence generation, and outputting the fluence optimized arc sequence for use in the radiotherapy treatment.

Abstract: Methods and systems for providing secure digital access to services are described. Embodiments include user behavior tracking, learning, and updating one or more contextual access algorithms and thereafter can act as multi-factor authentications. The method may include receiving data for a group of users and initializing a machine learning algorithm with the group data. The method may also collect individual user data and context data periodically, including characteristic behavior data, and update the machine learning algorithm with the individual user data. The method may further calculate a threshold for tolerance based on the updated algorithm, and verify user requests for access to the service. A multi-factor authentication may be presented to the user when the verifications are not acceptable, such as by being below a threshold. A permissions data structure can be generated and used to control access to the service.

Abstract: Methods and systems for continuously authenticating a user of a device by comparing current sensor data of the device being used with a fingerprint generated from sensor data collected from the device during use by an authorized user. A likelihood value, indicating the likelihood that the user is an authorized user of the device, is generated and the user is authenticated when the likelihood value is determined to be acceptable.

Abstract: A method and system for watermarking content utilizing a user device GPU. Embodiments include receiving on a processing server a request from a video server for a video to be played on the user's device. The processing server may extract a set of identifying information, such as user information, from the request for the video. The processing server may further prepare shader software code which is to be executed on a GPU present on the user's device. The code preparation may include creating a watermarking procedure to be executed during playback on the user device. The processing server may further transmit the shader software code to the streaming video server to be transmitted to the user device for execution during video playback.

Abstract: A method and system for watermarking content utilizing a user device GPU. Embodiments include receiving on a processing server a request from a video server for a video to be played on the user's device. The processing server may extract a set of identifying information, such as user information, from the request for the video. The processing server may further prepare shader software code which is to be executed on a GPU present on the user's device. The code preparation may include creating a watermarking procedure to be executed during playback on the user device. The processing server may further transmit the shader software code to the streaming video server to be transmitted to the user device for execution during video playback.

Abstract: A method of providing access to content at a first device, the method comprising: receiving an item of content, wherein at least part of the item of content is encrypted, the encrypted at least part of the item of content being decryptable using at least one decryption key; in a first software client: obtaining a transformed version of the at least one decryption key; performing a decryption operation on the encrypted at least part of the item of content based on the at least one decryption key to obtain an intermediate version of the at least part of the item of content, wherein said performing the decryption operation uses a white-box implementation of the decryption operation that forms part of the first software client and that operates using the transformed version of the at least one decryption key; and performing an encryption operation on at least a portion of the intermediate version based on at least one encryption key to obtain re-encrypted content, wherein said performing the encryption operation

Abstract: A method and system for watermarking content utilizing a user device GPU. Embodiments include receiving on a processing server a request from a video server for a video to be played on the user's device. The processing server may extract a set of identifying information, such as user information, from the request for the video. The processing server may further prepare shader software code which is to be executed on a GPU present on the user's device. The code preparation may include creating a watermarking procedure to be executed during playback on the user device. The processing server may further transmit the shader software code to the streaming video server to be transmitted to the user device for execution during video playback.

Abstract: There are described methods and apparatus for scrambling digital content, such as video or audio content, by dividing the digital content into blocks set out in an original arrangement, and reordering the blocks from the original arrangement to a scrambled arrangement. Additional manipulation transforms such as rotations and reflections may be applied to individual blocks. A subsequent compression step may then be carried out. Methods and apparatus for carrying out corresponding descrambling of digital content are also described.

Abstract: A method of providing access to content at a first device, the method comprising: receiving an item of content, wherein at least part of the item of content is encrypted, the encrypted at least part of the item of content being decryptable using at least one decryption key; in a first software client: obtaining a transformed version of the at least one decryption key; performing a decryption operation on the encrypted at least part of the item of content based on the at least one decryption key to obtain an intermediate version of the at least part of the item of content, wherein said performing the decryption operation uses a white-box implementation of the decryption operation that forms part of the first software client and that operates using the transformed version of the at least one decryption key; and performing an encryption operation on at least a portion of the intermediate version based on at least one encryption key to obtain re-encrypted content, wherein said performing the encryption operation

Abstract: There are described methods and apparatus for scrambling digital content, such as video or audio content, by dividing the digital content into blocks set out in an original arrangement, and reordering the blocks from the original arrangement to a scrambled arrangement. Additional manipulation transforms such as rotations and reflections may be applied to individual blocks. A subsequent compression step may then be carried out. Methods and apparatus for carrying out corresponding descrambling of digital content are also described.

Abstract: A method and apparatus for enhancing content security including a content corruptor module having an input for encoded content, a content parameter modifier coupled to the input and having outputs for modified content and fixer data, a content encoder coupled to the output for modified content and having an output for encoded modified content and a fixer data encoder coupled to the output for fixer data and having an output for encoded fixer data. The modified encoded content discourages copying as it is not usable with the corrector data.

Abstract: Data that is to be transmitted to a viewer is encoded multiple times at multiple playback speeds. For example, a video advertisement may be encoded to play at normal speed, 4× normal speed, and 16× normal speed. Frames from the multiple encoded streams are combined to form a combined encoded stream that will play full motion video at each of the respective playback speeds. Thus, when a user elects to watch the video at a speed other than the slowest speed, the decoder will be able to decode the video at the selected speed to provide a full motion video output stream to the viewer at the selected playback speed.

Abstract: System and method for transparent single sign-on authentication on computers in a networked environment. A preferred embodiment comprises receiving an authentication request from an operating system of a first computer, requesting credentials of an application making the authentication request, authenticating the credentials, storing the credentials if the authentication is successful, and transmitting the credentials to a second computer. On subsequent access requests made by the user on the second computer, the credentials can be retrieved from the secure store, eliminating the need to prompt the user to re-enter authentication information.

Abstract: A technique for enabling a plurality of software components to communicate in a software component matrix environment is disclosed. In one particular exemplary embodiment, the technique may be realized by a method for enabling a plurality of software components to communicate in a software component matrix environment comprising the steps of encoding a request at a client side; communicating the request to a server at a server side via a communication interface; comparing the request to a plurality of operations supported at the server side; determining whether a function match exists at the server side; and returning a response comprising the function match to the client side in response to the request via the communication interface wherein the response is mapped to a data model of a client.

Abstract: A technique for enabling a plurality of software components to communicate in a software component matrix environment is disclosed. In one particular exemplary embodiment, the technique may be realized by a method for enabling a plurality of software components to communicate in a software component matrix environment comprising the steps of encoding a request at a client side; communicating the request to a server at a server side via a communication interface; comparing the request to a plurality of operations supported at the server side; determining whether a function match exists at the server side; and returning a response comprising the function match to the client side in response to the request via the communication interface wherein the response is mapped to a data model of a client.