First of all, for all those who do not yet know the Crypto stamp:
It is the first stamp that is also available as a digital collector's item in the Blockchain exists. It consists of two elements: On the one hand, there is the physical stamp, which can be used as a normal stamp. On the other side, you find the access to the digital "wallet" under several layers of material.
After the unicorn was created in 2019 and the honey badger, llama, panda and doge and the golden unicorn in 2020 with a 1 gram gold bar from the Austrian Mint, and then this year in May with the Crypto stamp 3.0 the latest version was presented, there is now a follow-up with version 3.1!
As with version 3.0, security features and functions were developed in collaboration with the crypto community and Security elements integrated, as previously only used for ID documents.