I like the simplicity and convenience of this. Does the secret phrase allow user to delete the page? Probably a good application for crypto currencies, or would be if the dream of micropayments ever comes to fruition!
ETH is a bit better but still not there yet. There's "3rd generation" systems like Hedera[0] that use hashgraphs instead and consume about as much electricity as anything else you'd do on the internet.
Or at least choose one that's actually dedicated to privacy like Monero
Cool project! I like the design and hope you had fun with it