Beyond Corp 1 – A New Approach to Enterprise Security

Virtually every company today uses firewalls to enforce perimeter
security. However, this security model is problematic because, when
that perimeter is breached, an attacker has relatively easy access to a
company’s privileged intranet. As companies adopt mobile and cloud technologies,
the perimeter is becoming increasingly difficult to enforce. Google
is taking a different approach to network security. We are removing the
requirement for a privileged intranet and moving our corporate applications
to the Internet.

Source: https://static.googleusercontent.com/media/research.google.com/en//pubs/archive/43231.pdf

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Beyond Corp 2 – Design to Deployment

The goal of Google’s BeyondCorp initiative is to improve our security
with regard to how employees and devices access internal applications.
Unlike the conventional perimeter security model, BeyondCorp
doesn’t gate access to services and tools based on a user’s physical location
or the originating network; instead, access policies are based on information
about a device, its state, and its associated user. BeyondCorp considers both
internal networks and external networks to be completely untrusted, and
gates access to applications by dynamically asserting and enforcing levels, or
“tiers,” of access.
We present an overview of how Google transitioned from traditional security infrastructure
to the BeyondCorp model and the challenges we faced and the lessons we learned in the process.
For an architectural discussion of BeyondCorp, see [1].

Source: https://static.googleusercontent.com/media/research.google.com/en//pubs/archive/44860.pdf