https://www.coindesk.com/edward-snowden-zcash-is-most-interesting-bitcoin-alternative/"Asked for his thoughts on monero, a competing private currency, Snowden said it was "amateur crypto" and pointed to traceability issues within the tech.
Snowden said that such design errors could put fellow whistleblowers at risk, stating: "Mistakes happen and have huge consequences for people like me.""
I'm not up-to-date recently about Monero dev, which mistake is he referring to?
ZEC principals produced and widely disseminated a paper which demonstrated that a large proportion of chain transactions from earlier revisions of the software could be linked and traced. Their analysis was disingenuous in that it did not pertain to the current software.
To call a revision incorporating mandatory RingCT 2 "amateur" is to highly esteem amateur work, and also extends "amateur" to include the work of many mathematical and cryptographic software professionals.
Anyhow, all respectable crypto is amateur. Professional crypto - RSA, anyone? - is uniformly backdoored AFAICT, while reliable crypto such as GPG and XMR is community-driven open source software, subjected to extensive peer review. Given the public statements of Green and Wilcox that ZEC can be backdoored responsive to a subpeona and the corporate single point of governance failure embodied in ZEC, as well as the historical facts that Alphabay was taken down 5 days after implementing ZEC and that the Alphabay ZEC was traced (while the XMR was not) I cannot imagine how anyone aware of facts on the ground could risk themselves to ZEC, not when the situation is serious.