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# System prepended metadata

title: Credential Backup Solutions

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title: Credential Backup Solutions
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# Credential Backup Solution 1 
## Cloning DNA Pattern

**Short Description:**
Alice clones a new Credential-Backup DNA with a unique network-id and save all her encrypted credential-data into it.(Creating a new network) And then asks her closed friends to install this new DNA. In the future she can re-join the Backedup DNA to recover her data.

![](https://i.imgur.com/XJVyllp.png =x750)

### Steps

* hApp contains 2 DNAs.
    * **SSI-DNA** is the main DNA that contains all the credential-data and all hApp users are part of it.
    * **SSIBackup-DNA** which is the backup DNA for one user credentails. and up and run with close friends of an agent.
* Alice creates a **Close Friend List** on the SSI-DNA. 
* Alice wants to backup data:
    * Alice should provide **12words** as secret-key of her backup.She should write these phrase on the paper and save it in the safe place.(like Metamask or any other Wallet).
    * Alice clone a new **SSIBackup-DNA** with the **network-id** which is the **Hash(12words)**.
    * Alice encrypt her credential-data with a **symetic-algorithm** using her **12words secret-keys**, and save them into **SSIBackup-DNA**.
    * Alice send message to her **close friends** to **install** SSIBackup-DNA with her **network-id**.
    * Alice's friends install a SSIBackup-DNA. And it is now live.
* Alice want to restore data.
    * Alice join the **SSI-DNA** again with new AgentId.
    * Alice use her **12words** to re-generate the **network-id**
    * Alice install **SSIBackup-DNA** with her **network-id**. Actually she re-joins to her backup-data dna which is live by her friends.
    * Alice query the data from **SSIBackup-DNA**     
    * Alice decrypt data with asymetric algorithm using **12words** secret-key and save data into **SSI-DNA**

### Pros
* **GDPR friendly**: If friends delete the **SSIBackup-DNA** on their devices, the data will be deleted permenantly.
* **Stand-alone DNA** for backup data.
    * Backup data is not connected to friends data.
    * New version or new changes to SSI-DNA doesn't effect SSIBackup-DNA.
    * Alice can easily restore her credential-backup on her **different devices**.
    * Friends can leave the main DNA but keep the backup DNA live on ther devices, for their friendship.
    
* **Rely on Gossiping Protocol**: In this pattern, Holochain gossiping porotocol plays important role to gossip SSIBackup-DNA data to friends in different Off-line/On-line scenarios.

### Cons
* More workload on Conductor and more Resources
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# Credential Backup Solution 2
## Private entry on sourcechain
**Short Description:**
Alice asks her closed friends to save her encrypted credential-data backup into their Sourcechain as private entry.
![](https://i.imgur.com/sB4hZkl.png)

### Steps

* hApp contains 1 DNA.
    * **SSI-DNA** is the main DNA that contains all the credential-data.
* Alice creates a **Close Friend List** on the SSI-DNA. 
* Alice wants to backup data:
    * Alice should provide **12words** as secret-key of her backup. She should write these phrase on the paper and save it in the safe place.(like Metamask or any other Wallet)
    * Alice creates a **access-code** which is **Hash(12words)**
    * Alice encrypts her credential-data with a **symetic-algorithm** using her **12words secret-keys**
    * Alice send message to her close friends list to save a copy of her encrypted credentail-data to their private sourcechain with **access-code**. Alice ask them to just share this data with anybody who provide **access-code**.
* Alice wants to restore data:
    * Alice re-join the **SSI-DNA** with new AgentId.
    * Alice should find and build the exact Close Friends List as before.
    * Alice use her **12words** to recover the **access-code**
    * Alice send message to her Close Friends List with **access-code**
    * Close Friends of Alice, should query their sourcechain and if **access-code** is valid, then return back the backup data to Alice.
    * Alice decrypts the data with asymetric-algorithm and her 12words secret-key
    * Alice restore the data.

### Pros
* Single DNA implementation. Less workload on Conductor.
* Backup footprint on DHT.
    * Creating a private entry on sourcechain to save a friend backup-data generates one Action on DHT.


### Cons
* **GDPR challange:** Backup data sits on another agents sourcechain data history, and can not be deleted permanently.
* Hard process and less secure of data-recovery:
    * Alice's friends require to identify her with new AgentId again to allow her to call remote function for recovery.
    * Or all agents should have a public and unrestricted function for recovery which is not secure.
* Implementation is more complex.