| 摘要 |
A tamperproof information ticket includes at least one transparent top sheet or layer, having a surface that is adapted to receive confidential printing, such as a confidential code and at least one bottom sheet or layer comprising means for scrambling the confidential printing, the scrambling means being visible through the top sheet or layer. The scrambling means can be irreversibly disabled by way of deformation of at least one part of said bottom sheet or layer. |
