Horizen’s Upcoming Zend Upgrade to Fix Vulnerability in Shielded Address
Partially anonymous blockchain and fork of ZClassic, Horizen, will be implementing a fix to the recent vulnerability discovered ZCash. The vulnerability which also affects Horizen involves an error in the amount of available funds in shielded sprout addresses. An incorrect amount of fund in displayed in the zend wallet app.
Although the vulnerability is not critically alarming, users may become frantic upon seeing a wrong balance. The vulnerability currently affects the Swing wallet, Sphere operating in full node and other related apps running full nodes on shielded addresses.
Shielded addresses encrypt transaction data and require the generation of zk-SNARKs in order to verify the transaction’s validity. Shielded addresses bring an increased level of privacy and security compared to transparent addresses.
A fix has already been published by Zcash, and Horizen will be integrating it into the next zend upgrade scheduled for April.