The problem Quantum Safe wallets with Pessimistic Sequencer solves

Why ?
The current crypto wallets are based on secp256k1 curve to generate key-pairs, but they are not quantum resistant. Usually using the curve we generate a private key, from which we generate a public key.
Private and Public key together is called Key Pair
Quick analogy

• Private Key → Bank acc password → Obv you dont share with anyone → Used to approve transactions.
• Public key → Bank acc number → Can be made public and shared to receive/send transactions.

Now with the current Key pair generation, there is a problem :
With current computers, Public key can be generated from a Private key which is safe and reverse is not possible. How ever with quantum computing, we can get private keys from public keys which is a threat since, i can now steal money from others wallets.
This is like, i give you my Bank acc number and you can figure out my Bank acc password and steal money from it.

Solution

• Add quantum safe cryptography to generate key-pair.
• Have a pessimistic sequencer to validate the signatures and send it to Ethereum.

Proposed Architecture

• The wallet is generated using

  superfalcon

  library which can generate key-pairs which are quantum resistant.
• For the demo, a dummy L2 chain is created where the state is account:balance and state transition function is just sending/receiving tokens.
• A transaction is signed by the quantum proof wallet and the state change is verified by a server (sequencer in this case).
• Once verified, the state root hash is updated and posted to Polygon or any other L1 of choice.
• Advantage is that since root hash is stored, the last state can always be recovered.

Challenges I ran into

1. Figuring out a key-pair generating package which worked took up a long time, and designing how to make it work with existing packages like ethers.

2. Moreover proofs could be leveraged using ZK but shortage of time and resources couldnt let me explore that option