Not your code provisioning, not your keys, not your privacy. All these online web crypto email services... you're trusting an untrustable third party web services, which exist and grovel to survive under license incorporation taxation permission and at leisure of untrustable government, to deliver unsigned unaudited crypto libs on the fly over the web into your browser for execution... that's fatal, and gets routinely exploited by authorities, snoops, courts, companies, crackers, admins, etc. If too incompetent and dumbed down from living a life of WinMac garbage to learn and use something like gnupg locally to safely cut and paste, at least consider using something like Mozilla Thunderbird as a mail client which includes gpg as a standalone local email crypto tool. WinMac is an online security spyveillance profiling phonehome datawhoring exploit nightmare and it just keeps getting worse. People really should start learning and using a unix... They're well documented, run great on common hardware, run web, office, mail, comms, emulators, games, cryptos, database, GUI, etc... and are free so you can donate to support development. https://www.freebsd.org/ https://www.openbsd.org/ https://archlinux.org/ https://linuxfromscratch.org/ https://www.kernel.org/ https://www.debian.org/