Cloudflare and Yubico are in partnership to provide YubiKeys at a discount:
https://www.cloudflare.com/products/zero-trust/phishing-resi...
Related thread: https://news.ycombinator.com/item?id=33020078
https://www.cloudflare.com/products/zero-trust/phishing-resi...
Related thread: https://news.ycombinator.com/item?id=33020078