| 摘要 |
<p>The invention concerns a method for protecting at least variable data printed on documents, consisting in covering the data (I) to be protected with a removable masking surface (X) and characterised in that it consists at least in providing the masking surface (X) with a variable position and/or shape while covering said data (I). The invention is particularly useful for gaming documents, in particular gaming tickets or lottery tickets.</p> |
