Abstract: An arrangement and method of allotting pattern units of an overall coding pattern in an information management system, are based on selectively setting a state indicator for each pattern unit to indicate one of a plurality of states. The flow of data in said system may be controlled based on the state indicator. The data may be originally recorded by an electronic pen from a coded product which is provided with at least part of a pattern unit. The product may be generated on demand by requesting an allotment of one or more pattern units.

Abstract: The present invention relates to a method, a system and a computer-readable medium storing computer-executable components for authenticating a digital pen. The invention is based on the idea that a paper look-up server issues an authentication receipt used by a service handler to authenticate a digital pen. The authentication receipt comprises such information that the service handler can use it to authenticate the digital pen without having to communicate with the paper look-up server.

Abstract: The present invention relates to a method, a system and a computer-readable medium storing computer-executable components in connection with transfer of information data to a recipient. The invention is based on the idea that generation of random number data and the calculation of digital signatures are performed before information data is accessible to a digital pen. Since asymmetric encryption of data is a demanding operation for said digital pen to perform in terms of processing power, a lot of time can be saved if the generation of random number data and asymmetric encryption of said random number data is performed in advance, when the pen is in an idle, non-communicating mode, for example during battery loading of the pen or when the pen is lifted from the position-coded paper. This alleviates delay times when the pen is in its communicating mode.

Abstract: An arrangement and method of allotting pattern units of an overall coding pattern in an information management system, are based on selectively setting a state indicator for each pattern unit to indicate one of a plurality of states. The flow of data in said system may be controlled based on the state indicator. The data may be originally recorded by an electronic pen from a coded product which is provided with at least part of a pattern unit. The product may be generated on demand by requesting an allotment of one or more pattern units.

Abstract: The present invention relates to a method, a system and a computer-readable medium storing computer-executable components for authenticating a digital pen. The invention is based on the idea that a paper look-up server issues an authentication receipt used by a service handler to authenticate a digital pen. The authentication receipt comprises such information that the service handler can use it to authenticate the digital pen without having to communicate with the paper look-up server.

Abstract: The present invention relates to a method, a system and a computer-readable medium storing computer-executable components in connection with transfer of information data to a recipient. The invention is based on the idea that generation of random number data and the calculation of digital signatures are performed before information data is accessible to a digital pen. Since asymmetric encryption of data is a demanding operation for said digital pen to perform in terms of processing power, a lot of time can be saved if the generation of random number data and asymmetric encryption of said random number data is performed in advance, when the pen is in an idle, non-communicating mode, for example during battery loading of the pen or when the pen is lifted from the position-coded paper. This alleviates delay times when the pen is in its communicating mode.