Over the last few weeks, the Signal private messaging app has experienced massive user growth, gaining tens of millions of new users, which resulted in a partial outage for 24 hours. It is exciting to see privacy tools adopted at scale. But the Zcash ecosystem can also learn from Signal’s growing pains by understanding our current limits, and planning infrastructure improvements that can guarantee an uninterrupted and secure user experience.

As part of the Foundation’s goal to grow user adoption, we want to understand the challenges to scaling Zcash. Once we know the limits of the current Zcash ecosystem, we plan to make the protocol and deployment changes needed to meet future user demand. These changes will help us maintain the Zcash network infrastructure in times of rapid growth.

As Signal has experienced, user growth can happen rapidly, driven by unexpected external events:

We have been adding new servers and extra capacity at a record pace every single day this week nonstop, but today exceeded even our most optimistic projections. Millions upon millions of new users are sending a message that privacy matters. …

Usage spikes are a common pattern for established privacy protocols. The Tor internet privacy network has also experienced significant usage spikes in response to external events. Tor is a mature, robust, distributed network, which has never gone down in response to usage spikes.

Scalability Goals

The Foundation wants to build a Zcash network that can scale to handle extra load. Here are some of our scalability goals for the network:

Scalability Engineering Questions

Over the next few years, the Foundation wants to work towards solutions for the following Zcash scalability engineering questions:

How can we build a Zcash network that will scale to a million users?

How can Zcash handle unexpected usage spikes?

How can Zcash handle unexpected usage spikes?

The Foundation wants to research these scalability questions, make the necessary protocol changes, and make plans to handle rapid user growth.

We are looking forward to collaborating with the ECC, the ZOMG, and the community in making private digital currency a reality for millions of regular users.

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