Michele Fabbrini, 2022-05-22, This memo aims to introduce the strategy of "write-up-alien cryptography", presenting a symmetric encryption algorithm which, in our opinion, can be deemed the initially ever built to encounter the issues posed by make contact with with an alien civilization. Michele Fabbrini, 2022-05-21, In this paper we describe a symmetric important algorithm that offers an unparalleled grade of confidentiality.