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# System prepended metadata

title: EPF - Update 3

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## Introduction: The Complexities of Cryptographic Key Management

Cryptographic key management remains a critical challenge in the realm of technology, and enhancing existing solutions like BIP32 holds immense promise. In the context of Ethereum, where my focus lies, the adoption of improved key management techniques could significantly impact the ecosystem.


## Understanding the Existing Landscape: BIP32 and Its Limitations

To delve into this enhancement, a solid understanding of the original BIP32 specification is essential. This blueprint lays the foundation, yet it's clear that there's room for improvement. Let's highlight the reasons for this:

1. **Complex Parameter Handling**: The reliance on multiple sources, such as SLIP-0044, to gather algorithm parameters.
3. **Derivation Complexity**: The current derivation uses numerical indexes for protocol names, which must be taken from a separate document and does not specify a standard way to assign indexes.
4. **Inadequate Key Scheme**: A more secure approach would involve limiting the scheme to hardened keys to mitigate security and privacy risks.
5. **Interoperability Concerns**: The existing scheme's compatibility with non-secp curves is suboptimal.


## Proposed Solution: Streamlined Key Derivation with HKDF

A new approach aims to simplify the key derivation process and address the challenges outlined earlier:

* **Single HKDF Call**: The proposed method involves a single HKDF call with straightforward parameters.
* **Simplified Protocol Identification**: Deriving child keys is as simple as calling derive_child_key(seed, "eth"), or derive_child_key(seed, "eth", 1) for specific instances.
* **HKDF Advantages**: HKDF offers benefits such as efficient key derivation from keys and stronger security guarantees than HMAC.
* **User-Friendly Account Handling**: The flexibility of HKDF allows for an empty salt, which translates to an account_id of 0.


## Engaging with Mentor: A Discussion with Kev

An exciting development in this journey is the availability of Kev, a mentor whose area of focus is Cryptography, on the channel. I will be engaging with Kev, and this will help refine the proposed approach and determine the best way forward.


## Next Steps and Future Outlook

With Kev's insights and expertise, the next steps will involve further discussions and potentially moving towards an implementation. As this project gains momentum, I intend to release a comprehensive project proposal detailing the enhanced key management solution.

## An Update on FHE-DKSAP: Learning and Collaborating

Shifting gears, my exploration of Fully Homomorphic Encryption Dual Key Stealth Address Proposal (FHE-DKSAP) continues to be both engaging and enlightening. While Mason's team has made significant progress, I'm actively seeking avenues where I can contribute effectively to the project. In subsequent updates, I'll provide more insights into this journey.