Bright Ideas Blog

Encrypted Traffic

Investigating the effects of TLS 1.3 on Corelight logs, part 1

Introduction I’ve written previously about Corelight data and encryption. I wanted to know how TLS 1.3 would appear in Corelight data, and compare the same network conversation over clear-text HTTP, TLS 1.2, and TLS 1.3. In this first of three... Read more »

Is there a ‘Z’ in “Vectra”?

Having worked on Zeek (Bro) for well over two decades now, it’s hugely gratifying – and frankly still somewhat amazing – to see how widely it is used in today’s enterprises. Zeek’s real-time analysis capabilities, extensible scripting,... Read more »

How Zeek can provide insights despite encrypted communications

Overview Encrypted communications are ubiquitous. While encryption provides confidentiality, it cannot prevent all means of traffic analysis. Certain protocols, such as SSH and TLS, ensure contents are not directly readable by monitoring systems.... Read more »

Examining aspects of encrypted traffic through Zeek logs

In my last post I introduced the idea that analysis of encrypted HTTP traffic requires different analytical models. If you wish to preserve the encryption (and not inspect it via a middlebox), you have to abandon direct inspection of HTTP payloads... Read more »

Network security monitoring is dead, and encryption killed it.

This post is part of a multi-part series on encryption and network security monitoring. This post covers a brief history of encryption on the web and investigates the security analysis challenges that have developed as a result. I’ve been hearing... Read more »


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