Are there any Javascript-compatible Proof of Work concepts that are memory-bound?

I am looking for a way to implement a Proof Of Work in Javascript. Initially, I considered using a hashcash based approach but realized that it may not provide sufficient protection. This is because the task of reversing partial hashes is primarily CPU intensive, making it easier for an attacker using a binary tool to outperform browser performance (potentially even through JIT enhancements).

As a result, I am interested in finding a Proof of Work method that places less strain on the CPU and instead requires a set number of memory accesses for completion. I believe this type of task would be more suited for Javascript engines within browsers compared to compiled binaries solving the same task. Can anyone offer suggestions on where to locate implementations of memory-bound Proof Of Work systems?

javascript complexity-theory

Answer №1

Explore my innovative Cuckoo Cycle proof-of-work on https://github.com/tromp/cuckoo

In the README, it states:

"Cuckoo Cycle introduces a significant advancement in three key areas:

1) each random memory access only requires a single inexpensive siphash computation,

2) memory usage scales proportionately with graph size, allowing for customizable settings. There is minimal flexibility for decreasing memory consumption without sacrificing speed.

3) proof of work validation is instantaneous, necessitating 2 sha256 and 42x2 siphash computations.

The performance of Cuckoo Cycle is primarily impacted by memory latency (67%)."

Answer №2

When it comes to JavaScript-based Proof of Work, the current leading technology appears to be kaPoW, with accessible source code found here.

The Wikipedia reference you shared lists several valuable resources for memory-bound Proof of Work. It is possible for kaPoW to adapt and utilize one of these alternatives if you are looking to implement an existing framework.

Answer №3

One unique way to demonstrate proof of work is by burning bitcoins. There is no stronger indication of destroyed value than this method. While implementing actions in Javascript may seem clever, if your blockchain holds any value, it's likely that someone will develop a more efficient solution using CUDA technology, rendering Javascript obsolete.

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