Abstract: A content code is defined containing user content, and a corresponding profile code defining user context information. The profile code may be scanned and stored temporarily in a user device or elsewhere. The user content can then be modified on the basis of the stored context information. In some cases the context code and profile code may be separate, so that a given profile code may be applied to diverse pieces of content, or may be combined. The stored context information may be undated or modified when particular events, such as re-scanning a code, occur. The codes may comprise binary codes, such that the profile code and the content code can be compared by a logical operation.

Abstract: Secure identifiers for a series of articles are generated by encoding a characterising value such as a time stamp or serial number of each article with a pointer to a database entry such as a blockchain entry storing a range of valid characterising values, or other rule permitting the validation of each characterising value. When an identifier is challenged, the pointer is extracted and used to retrieve the rule, against which the characterising value extracted from the same identifier is tested.

Abstract: Secure identifiers for a series of articles are generated by encoding a characterising value such as a time stamp or serial number of each article with a pointer to a database entry such as a blockchain entry storing a range of valid characterising values, or other rule permitting the validation of each characterising value. When an identifier is challenged, the pointer is extracted and used to retrieve the rule, against which the characterising value extracted from the same identifier is tested.

Abstract: A content code is defined containing user content, and a corresponding profile code defining user context information. The profile code may be scanned and stored temporarily in a user device or elsewhere. The user content can then be modified on the basis of the stored context information. In some cases the context code and profile code may be separate, so that a given profile code may be applied to diverse pieces of content, or may be combined. The stored context information may be undated or modified when particular events, such as re-scanning a code, occur. The codes may comprise binary codes, such that the profile code and the content code can be compared by a logical operation.

Abstract: An object is associated with an identifier which is detectable on the object. The identifier may be an inherent characteristic of the object itself or its packaging, or it may reflect a random or arbitrary value which may then be disposed on the object or its packaging deliberately in a readable form for the purposes of the invention. Additionally, there is disposed a machine readable code comprising a URI incorporating a representation of the object identifier encoded according to one of a number of predefined encoding methods (algorithm and associated parameters), and an encoding identifier, specifying the encoding method used. A reader can read the machine readable code, decode it according to specified encoding method, and prepare a representation of it for comparison with the characteristic reflecting the object identifier. The machine readable code and the characteristic reflecting the object identifier may be readable for example by optical, tactile, radio, olfactive or acoustic mechanisms.

Abstract: An object is associated with an identifier which is detectable on the object. The identifier may be an inherent characteristic of the object itself or its packaging, or it may reflect a random or arbitrary value which may then be disposed on the object or its packaging deliberately in a readable form for the purposes of the invention. Additionally, there is disposed a machine readable code comprising a URI incorporating a representation of the object identifier encoded according to one of a number of predefined encoding methods (algorithm and associated parameters), and an encoding identifier, specifying the encoding method used. A reader can read the machine readable code, decode it according to specified encoding method, and prepare a representation of it for comparison with the characteristic reflecting the object identifier. The machine readable code and the characteristic reflecting the object identifier may be readable for example by optical, tactile, radio, olfactive or acoustic mechanisms.

Abstract: A method for coding an access to a computer resource comprises, in a physical representation of a code, first information encoded with a first coding type corresponding to an access path and to an identification of said computer resource, and fit to be decoded by a reader, wherein said physical representation further comprises conditional validity information encoded with a second coding type corresponding to a condition of validity of an access to said computer resource, with said conditional validity information fit to be decoded by an application installed in one element of the network including the reader of the physical representation, one or more gateway(s) and the server hosting said computer resource.

Abstract: An optical-reading code preparation device includes: a storage unit able to receive data to be coded, and parameter data including presentation data, an encoding unit, able to produce code data on the basis of data to be coded and of parameter data, an imaging unit, able to produce data defining an image plane on the basis of presentation data and/or of code data, a scheduler devised so as to, in response to the receipt of data to be coded and of parameter data comprising presentation data: call the encoding unit with the data to be coded and the parameter data received so as to produce associated code data, call the imaging unit with the associated code data, selectively with some at least of the presentation data, call the imaging unit, and prepare an optical-reading code.

Abstract: An optical-reading code preparation device includes: a storage unit able to receive data to be coded, and parameter data including presentation data, an encoding unit, able to produce code data on the basis of data to be coded and of parameter data, an imaging unit, able to produce data defining an image plane on the basis of presentation data and/or of code data, a scheduler devised so as to, in response to the receipt of data to be coded and of parameter data comprising presentation data: call the encoding unit with the data to be coded and the parameter data received so as to produce associated code data, call the imaging unit with the associated code data, selectively with some at least of the presentation data, call the imaging unit, and prepare an optical-reading code.

Abstract: An optical-reading code preparation device includes: a storage unit able to receive data to be coded, and parameter data including presentation data, an encoding unit, able to produce code data on the basis of data to be coded and of parameter data, an imaging unit, able to produce data defining an image plane on the basis of presentation data and/or of code data, a scheduler devised so as to, in response to the receipt of data to be coded and of parameter data comprising presentation data: call the encoding unit with the data to be coded and the parameter data received so as to produce associated code data, call the imaging unit with the associated code data, selectively with some at least of the presentation data, call the imaging unit, and prepare an optical-reading code.