- Everybody creates a new RSA keypair, signs it with the old private key and publishes it.
- Everybody creates their new key pair
- Everybody uses the new public key as message and creates the hash and signature padding for each of the Step 1 RSA keys. Then he blinds and signs them with his old keypair and publishes them.
- Everybody textbook signs the blinded messages with his RSA private key from step 1. They can see which are valid, because they were signed with the original key.
- Everybody unblinds his own public key messages
Now those new public keys are valid that have a valid signature of everybody's step 1 RSA key.