A data support with data to be kept secret and a data support with data to be kept secret

摘要

The present invention relates to a support onto which data (3A) to be kept secret is applied, said support comprising: a masking background comprising a substrate (1) and a background, in particular an irregular array of characters applied to the substrate 2C), wherein the characters are formed of a transparent non-chromogenic printing ink which is phosphorescent under UV light.