A privacy first period tracker? Is it even possible?
summary
Builds a minimal MVP launched that actually encrypts data in-browser using the Web Crypto API and password‑based key derivation (salted PBKDF) so ciphertext goes to the cloud but keys stay client-side. Adds asymmetric keypairs to enable selective sharing, requires transferring a secondary secret key for multi‑device backup, and notes revocation forces full re‑encryption. Tries authentication options (SRP vs hashing the derived key) and experiments with Blockstack for easier crypto and auth integration.
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chapters (12)
- 0:00Intro
- 0:33Background
- 2:22Privacy first period tracker
- 4:57Encryption
- 6:14Randomness
- 8:18Web Crypto
- 11:14Key derivation
- 14:46Cloud storage
- 16:42Trend encryption
- 17:09Asynchronous encryption
- 23:37Authentication
- 25:45Conclusion
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