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I think you might be misinformed - their security is based on client-side encryption which is open source. See: - https://protonmail.com/blog/protonmail-open-s

I think you might be misinformed - their security is based on client-side encryption which is open source. See: - https://protonmail.com/blog/protonmail-open-source-crytography/ https://protonmail.com/blog/protonmail-open-source-crytograp... - https://protonmail.com/blog/protonmail-secure-email-open-source/ https://protonmail.com/blog/protonmail-secure-email-open-sou... You don't have to trust any of their server code - you only have to trust that the JavaScript blob they send you is actually the same as the open source version. This is the same threat model as trusting Signal from the App store instead of side-loading it yourself.

earenndil 8y ago
As has been frequently pointed out, they could choose one account and serve that account a different webpage just once, and harvest their password in order to decrypt all their email in perpetuity. This would be a trivial change that would certainly go unnoticed.
- snovv_crash 8y ago
  I fail to see how this is any worse than any of their competition, which does server side encryption. At least with ProtonMail there is the chance of them being caught serving backdoored client-side pages - with server-side you would never know. I feel like the hate is a case of people thinking not being perfect is worse than being average or bad.
  - earenndil 8y ago
    If protonmail is billed as a pgp replacement, then people will think it is reasonable to use protonmail's encryption instead of 'offline' encryption, when that's not the case at all.
    - snovv_crash 8y ago
      A version of ProtonMail with the application hosted locally, and no auto-updates, would fulfill your requirements I believe.