In the previous post I showed you how to connect two peers using Versile. In this post I'll show how to authenticate the party requesting the connection. Authentication in Versile is done by checking the public key received from the other party. Both sides can check the identity of the other side. Identity key pairs can be generated using Versile Decentral Identity ( VDI ), which in many ways is similar to SSH-keygen. Using VDI is as simple as usernames and passwords, but not having to share this with the other party increase security - and the keys can be exchanged privately between the two parties, no certificate authority needs to be involved. A Versile Decentral Identity can be generated from Groovy/Java as simple as this: VPrivateCredentials key = new VPrivateCredentials(VDecentralIdentity.dia(1024, 'versilegroovy', 'peter', 'asdfghjkl12345')) And we can print the public key: print new String(key.getKeyPair().exportPublicArmoredPkcs())