VaultMemo
Encrypted memo vault with on-chain proof, for Solana Seeker & Saga
Your secrets stay yours. Your proof lives on Solana.
What it does
VaultMemo stores your seed phrases, passwords, and private notes on your device only — never on a server. Each time you save, a fingerprint of that note is written to the Solana blockchain, so you can later prove it existed and hasn't been altered, without ever exposing the note itself.
Local-only encryption
Notes are encrypted and stored on your device. Nothing is uploaded, no account is needed.
Tamper-evident proof
A hash of each note is recorded on Solana mainnet, so anyone can independently verify it later.
Seed Vault–derived key
Your Solana wallet signs a fixed message, and that signature is used to derive the encryption key. No PIN, no biometrics.
Pay per save
No subscription. A small one-time payment unlocks storage by size, in SKR, SOL, USDC, or USDT.
How it works
Seed Vault signs
Your wallet signs a fixed message on-device. The private key never leaves the hardware.
A key is derived
That signature is hashed to create an AES-256 encryption key, held only in memory.
A proof goes on-chain
A fingerprint of the encrypted note is recorded on Solana as tamper-proof evidence it existed.
FAQ
Common questions about how VaultMemo handles your data.
Is my memo content visible on the Solana blockchain?
No. Your memo is encrypted and stored only on your device. Only a random hash fingerprint — proof that the note existed — is recorded on-chain, never the content itself.
What happens if I forget my password?
There's no separate password to forget. Your encryption key is generated instantly from a Seed Vault signature each time, so as long as your wallet's seed phrase is safe, you'll never lose access to your key.
What happens if I lose my wallet's seed phrase?
Since your encryption key is derived from your wallet's signature, losing the seed phrase means permanently losing access to your encrypted notes. Keep your seed phrase and your .vam backup files stored safely, in a separate place.
Will my notes disappear if I delete and reinstall the app?
No. Your encrypted .vam files are stored in a folder you chose on your device (e.g. Downloads/VaultMemo), not inside the app itself. Reconnect with the same wallet after reinstalling, and everything is still there.
How does on-chain verification work?
VaultMemo compares the hash of your saved file against the record actually written to the Solana blockchain. If even one byte has changed, or the file is fake, verification fails.
What is the Encryption Certificate, and how do I use it?
Once a memo has been verified, you can instantly generate a security certificate image (PNG) right in the app. It includes your wallet address, the on-chain transaction ID, and the save timestamp — so you can share it, like a business card, as proof that a note existed unaltered at that point in time.
What's different about real-time RPC verification?
Starting in v1.3.4, VaultMemo compares your saved file's hash directly against the live record on the Solana blockchain (RPC). If even a single byte has been changed or tampered with, verification fails immediately, guaranteeing the integrity of your data.
Do I need to pay a monthly subscription?
No. There's no subscription at all. You pay a small, one-time fee based on the note's size only when you save it. Notes under 200 bytes are free.
VaultMemo says it has no servers, so why does it use Firebase?
Firebase Remote Config is used only to push pricing updates and in-app announcements, not to store or process your data. Your memo content, wallet keys, and personal information are never sent to Firebase or any other server. View source code