add details about encryption used

[netlify[bot]]

✅ Deploy Preview for spiffy-speculoos-6d4c53 ready!

Name	Link
🔨 Latest commit	e6192fd6faa21aec25e2477ef149befcdafa9d15
🔍 Latest deploy log	https://app.netlify.com/sites/spiffy-speculoos-6d4c53/deploys/660c7bd4baf96f00080a1c55
😎 Deploy Preview	https://deploy-preview-445--spiffy-speculoos-6d4c53.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.