Technical solution to Storing and retrieving encrypted data

[rockyy11]

Use case Scenario - An Eternal Trust's user called “Bob” needs to use the dynasty support product (a crypto trust) for the benefit of his children. He wants to distribute 1 ETH per month among every child from January-2018 (Start-time) to December-2018(End-time) without disclosing this data to any central authority.

Front-end:-

1. Make the form for an Eternal Trust's user called “Bob”, who will fill the details.

Eg: Details-

{
Interval-in-months: 1, #Interval in which the amount will be transferred.
To-addresses: {
Address1: {
Intervals: 3, #till how many intervals is the amount transferred to specific child
Value: 1eth, #amount to be transferred regularly
},
Address2: {
Intervals: 6,
Value: 2eth
},
Address3: {
Intervals: 9,
Value: 3eth
}

}
}

2. Break the data for to-addresses according to intervals, each file will have the details only related to that month.
   Eg:

Month-1
{
Address1: 1eth,
` Address2: 2eth,
Address3: 3eth
}

Month-2
{
Address1: 1eth,
` Address2: 2eth,
Address3: 3eth
}

Month-4
{
Address2: 2eth,
Address3: 3eth

}

Month-9
{
Address3: 3eth

}

3. Randomly generate 9 AES keys and encrypt month-1 to month-9 json files using those AES keys , send those encrypted file at server (backend).
4. The AES keys we got from the 3rd step, we will use Shamir's Secrets sharding algorithm and break the AES key into N number of shard keys where N is the number of oracles. Each shard will be encrypted by respective oracle's public key (generated using RSA algorithm).
5. We will send these encrypted shard to backend(server).

Backend (Central server) :-

Store all the received encrypted file (From step 3 of front-end) at IPFS and get there hashes and store them at Hyperledger.
Store all the encrypted shard (from step-5 of front-end) in hyperledger.
Oracle servers work :-
When the time meet for transferring the amount to children account, The oracles will get the encrypted shard keys from Hyperledger and decrypt it(shard key) using their respective private keys and if the majority of oracles agree for the transfer then they will give their respective decrypted shard key to any one Oracle server, and that server will get the AES key and get the data encrypted data from IPFS and decrypt the data with AES key and transfer the amount using EOS smart contracts.