| 摘要 |
<p>The invention concerns a method and a system for limiting the possibility of transforming data, said transformation of TX data into TY data, being produced with a type A transforming function, while the transformation of TY data into TX data is produced with a type B transforming function, inverse of the type A transforming function, the data being in particular designed to constitute for example pre-payment tokens. The invention is characterised in that the system comprises at least a type A processing system (STDA), at least a type B data processing system (STDB), at least a link, at one time at least, between the system (STDA) and the system (STDB), at least a type A processing and storage unit (UTMA) comprising at least the type A transforming function, at least a type B processing and storage unit (UTMB) comprising the type B transforming function and not comprising the type A transforming function.</p> |
