Cossack Labs Blog

23 Mar 2021

Cloud security: gaps in a "shared responsibility" model

"Cloud is secure"–is a mistaken belief: deploying an app to a cloud sounds like "risk outsourcing", while in reality, it's more like "risk sharing". In this article, we observe the security responsibility of cloud providers: where it ends, what are the gaps and grey areas, and what risks security teams should take into account when using "as a service" platforms.


22 Oct 2020

React Native security: things to keep in mind

In this article, we shed light on React Native apps’ security based on our experience and explain some risks, and threats developers should address to prevent typical mistakes.


14 Sep 2020

Security logs: cryptographically signed audit logging for data protection

We cover cryptographically signed audit logging, when logs are generated in a certain way which prevents tampering messages, removing, adding or changing the order of log entries. We explain why signed logs are essential for security software, how we’ve built-in secure audit logging in Acra, and how to use it together with other defense in-depth layers in your systems.


10 Jun 2020

3 Mistakes to Avoid When Dealing With OpenSSL Versions and iOS Apps

OpenSSL complexity starts with its version string. Apple, Carthage, and some dependency analysis tools have different opinions about it. Here is how we dealt with them and submitted iOS app to the App Store.


10 Jun 2020

Swift Way to Build OpenSSL for Carthage iOS, As We Did It for Themis

This story is dedicated to fellow developers struggling with updating Carthage package with the latest OpenSSL for iOS and macOS apps. Here you will find the scripts, error messages, testing matrix, and our working solution for Themis to this no small feat. We believe it could save you time then you meet the same task.


28 Oct 2019

Security Engineering Advice: 4 Ways to Prepare for Security Incidents

Don't be afraid of security incidents, prepare to them in advance. Choose the scenario that suits your company and fits your budget.


5 Sep 2019

Implementing End-to-End encryption in Bear App

How we helped the Bear note taking app for iOS/macOS, which decided to implement note encryption for their huge existing user base. A story about finding a balance between usability, security, and mobile platforms' restrictions.


4 Apr 2019

Building Defence in Depth for Your Data Using Acra

How to protect the data in your app infrastructure using the defence in depth approach, explained on the example of Acra encryption suite.


22 Nov 2018

How to Implement Tracing in a Modern Distributed Application

A battle-tested explanation of why tracing is a very useful technique you can benefit from in your projects. A story from the trenches of implementing distributed tracing in our Acra data security suite.


29 May 2018

Reducing Docker Image Size for Acra

We tried out and described a few approaches to reducing the size of Docker images for the components of our database encryption suite Acra. As a result, we found a way to reduce the container size by roughly 62 times.


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