Abstract: A software application to be performed by a second computing resource on behalf of a first computing resource is transmitted to and installed on the second computing resource, and is run thereon using inputs received via a user interface. The software application includes a verification module for creating a sequence of data consisting of a plurality of choice points defining the sequence of events which occurred during the running of the software application. The sequence of data is transmitted to the first computing resource together with the result of the execution of the software application, the first computing resource being adapted to check the sequence of data to determine whether or not the software application was executed correctly.

Abstract: A computer system comprises a first computer entity arranged to encrypt data using an encryption key comprising a time value, and a second computer entity arranged to generate, at intervals, a decryption key using a current time value. The encryption and decryption processes are such that the decryption key generated using a current time value corresponding to that used for the encryption key, is apt to decrypt the encrypted s data.

Abstract: A software system for installation on computing apparatus (and a method of installing such a software system on computing apparatus), wherein the software system is provided in the form of a software package (10) including a plurality of software components (12), one or more of the software components (12) being provided as a plurality of different implementations (14), the apparatus including an installation engine (20) for installing the software system only a selected one implementation of the or each of the software components having multiple implementations, and a random selector module (22) for selecting one of the plurality of implementations of a software component for installation.

Abstract: A method for encrypting data comprising deriving a public key using a first data set provided by a second party; encrypting a second data set with the public key; providing the encrypted third data set to the second party; providing the public key to a third party to allow validation of the first data set such that on validation of the first data set the third party provides an associated private key to the second party to allow decryption of the encrypted second data set.

Abstract: Audio alerts are provided in an environment, such as a house, concerning categorized events to be reported. Examples of the events are receipt of e-mails and voice mails. The presence of a person entering or leaving a space of the environment is detected and a processing system determines reportable event categories that have occurred. Each possible event category has a corresponding audio signature. The event categories signatures that have occurred are played either simultaneously or sequentially, within the hearing of the person detected.

Abstract: A browser with a sound input receives a sound passage associated with a content site. The browser sends a representation of the sound passage to a service system where it is compared with stored representations of sound passages that each have an associated URI. On finding a match, the service system sends back the URI associated with the matched stored sound-passage representation. The browser uses this URI to access the content site.

Abstract: To encode a URL in sound, the characters of the URL are mapped to sound codewords each of which is used to produce, in a sound output, a sound feature particular to that codeword, the nature of the sound features and of the overall mapping between characters and sound features being such that at least certain character combinations that occur frequently in URLs produce sound sequences of a musical character. Decoding of the sound URL effects the reverse mapping.

Abstract: Audio alerts are provided in an environment such as a house (10) in respect of categorized events to be reported. These events are, for example, the receipt of e-mails and voice mails. To this end, the presence of a person entering or leaving a space (11) of the environment is detected (12) and a processing system (13) makes a determination of what categories of reportable events have occurred. Each possible event category has a corresponding audio signature and the signatures of the event categories that have occurred are now played (14) within the hearing of the person detected, either simultaneously or sequentially.