Yes, and yes it is secure. That is to say the data is encrypted and only you and the person(s) you are sending to have access to it. I have used it for creden

Yes, and yes it is secure. That is to say the data is encrypted and only you and the person(s) you are sending to have access to it. I have used it for credential sharing and use kbfs (Keybase's encrypted file sharing) for a simple secret storage mechanism for shell scripts. I map my encpass (https://github.com/plyint/encpass.sh https://github.com/plyint/encpass.sh) directory to kbfs.