Ars Technica: Hackers steal secret crypto keys for NordVPN. Hereās what we know
so far.
[1]https://arstechnica.com/information-technology/2019/10/hackers-steal-secret-c
rypto-keys-for-nordvpn-heres-what-we-know-so-far/

References

   1. https://arstechnica.com/information-technology/2019/10/hackers-steal-secret-crypto-keys-for-nordvpn-heres-what-we-know-so-far/