O: Hada de recursos de Seguridad Digital

revealed in 2014 in the book "Global Surveillance" by Glenn Greenwald that the NSA's "TAO" (Tailored Access Operations) unit has been intercepting and tampering with technical devices in transit since at least 2010.

The relevant factor in this process is the amount of elements on the edge of the sticker. In addition, there are special seal stickers available which break when peeled off. They are probably more suitable for this method.

Glitter nail polish directly This method is used by Nitrokey, Purism and others, and is safer compared to the previous method in our view. The screws are sealed directly with glitter nail polish. The screws holes are particularly relevant here.

Our favorite so far is sealing screws with epoxy resin and glitter nail polish, where the polish can be in or over the resin.

random mosaic $ rm -r ice An alternative to sealing is embedding the whole object in a substance whose surface forms a mosaic that is difficult to reproduce and changes when manipulated. It should be as easy as possible to check the mosaic manually or by technical means. The goal is to protect written documents, data carriers, communication devices, hardware wallets and other sensitive objects in such a way that unauthorized access can be detected with greater probability. We distinguish between two use cases: short-term storage and longer-term storage or shipping.