
A look back: NU5 and network sandblasting
This post details ECC’s motivations, challenges, and accomplishments with regard to zcashd Network Upgrade 5 (NU5) and the sandblasting attack.

This post details ECC’s motivations, challenges, and accomplishments with regard to zcashd Network Upgrade 5 (NU5) and the sandblasting attack.

After releasing multiple updates to zcashd and lightwalletd, plus new mobile SDKs that, together, introduced new innovations (and learning) in the world of cryptography and decentralized money, ECC is exiting Emergency Mode.

Release 5.6.0 introduces the functionality necessary for light wallets to access spendable funds without fully scanning the blockchain. This is a critical component in the path to exiting emergency mode

Release 5.5.0 introduces a number of bug fixes and changes to the underlying libraries that support Zcash. Much of this work lays the foundation for the fund availability features coming with the next release.

Electric Coin Co. (ECC) has been working since June to resolve Zcash wallet performance issues that are affecting users of third-party apps Edge, Nighthawk, and Unstoppable.* All three of these mobile wallets utilize the ECC SDK.Our engineers have made progress, however, work remains — including further updates to zcashd, lightwalletd, the ECC wallet SDKs, and the ECC prototype wallet — to fully restore good user experience in the impacted apps.

It has become clear that the best way for ECC to contribute to the Zcash community over the next three years is to release an official ECC wallet on top of a highly interoperable Zcash protocol that leverages proof-of-stake consensus.

We’re introducing “auto-shielding” in our mobile wallet SDKs and unified addresses at the Zcash protocol level. In supporting wallets, these two features ensure your Zcash transaction and balance information is automatically encrypted — Shielded by Default — in the latest, most secure shielded pool.

Following the example of Vitalik Buterin’s Gitcoin Grant retros, this post summarizes the projects funded and lessons learned from the first Zcash Gitcoin Grant Round.

Unstoppable became the first multi-currency wallet to enable shielded Zcash transactions. Thiis an important milestone for shielded addresses, which allow users to send confidential peer-to-peer transactions.

With help from community volunteers, ECC exceeded its goal and added localization in five languages to our open-sourced apps.

ECC open-sourced our work-in-progress iOS and Android Zcash wallets last week, so it makes sense for the ECC security team to provide some transparency into the work we’ve engaged in

Earlier this year, ECC released a suite of libraries for building shielded mobile wallets in support of the shielded-Zcash ecosystem. We used these wallet libraries to build ECC Wallet, a
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