Conferences & events

At the Defense Tech Stage of DOU Day 2025, Anastasiia Voitova, Head of Security Engineering at Cossack Labs, spoke about how modern defence systems are built to remain resilient in high-risk operational conditions. A strong cybersecurity foundation enables faster OODA loops and a more efficient decision-making process.

One example is Ukraine’s largest situational awareness system—accessible via laptops and smartphones over the internet—which faces attacks from opportunistic threats leveraging well-known vulnerabilities to highly sophisticated nation-state operations.

Cossack Labs shared practical approaches on speeding up decision-making in cybersecurity for mission-critical systems at NATO TIDE Sprint 2025 event, held by NATO Allied Command Transformation. The talk covered defense-in-depth, security by design, dynamic cryptographic trust, and insights on building security for situational awareness and defense systems.

Anton shared the best practices for building anti-reverse engineering controls, explain why these defences are essential for protecting sensitive data in mobile applications, and how they can fail.

Anastasiia Voitova described the multi-layered security of a modern robotic and autonomous system designed to protect devices and their data. Building defence-in-depth measures include operating system hardening, automated secure device provisioning pipelines, unambiguous device identification, data security for telemetry and commands, secure over-the-air updates, active reverse engineering protections, reducing human involvement, and more.

Anastasiia Voitova, Head of Security Engineering at Cossack Labs, talked at the DOU Day offline conference about building secure architecture for mission-critical applications. Anastasiia focused on reinforcing the resilience of critical systems to make them secure and reliable.

Product security is a process, and some of the steps could be automated to save resources and prevent security regressions. Our Security Engineer, Elmir Iskanderov, talked about his experience and ways to speed up product updates through automation at the Online QADay conference.

Head of Security Engineering Anastasiia Voitova shared unique expertise on building resilient security controls for mission-critical applications and defending nation-wide infrastructures from cybersecurity threats at NATO TIDE Sprint 2024 event, held by NATO Allied Command Transformation.

Cossack Labs participates in the discussion of current issues of assessing the state of cybersecurity of critical infrastructure and took part in the “Critical Infrastructure Cybersecurity Diagnostics: Strengthening Digital Protection” conference. The conference was held by USAID Cybersecurity Activity, the State Service for Special Communications and Information Protection of Ukraine and the Ministry of Digital Transformation of Ukraine.

The talks focused on critical infrastructure cyber defence enhancement as part of the USAID-supported Program for diagnosing cybersecurity status of critical infrastructure operators. The Program is based on the updated NIST Cybersecurity Framework 2.0 from National Standards and Technology Institute.

Ihor Malchenyuk, Head of Customer Solutions at Cossack Labs, spoke at the CYBERSEC FORUM/EXPO 2023 panel “Investments in Cybersecurity in the CEE Region.”

Ihor discussed cybersecurity challenges in the CEE region, such as the growing number of malware and ransomware attacks, the increased focus on users/people and endpoints, the rising cost of data breaches, the expansion of privacy regulations, and cyberwarfare against mission-critical applications and critical infrastructure assets.

The main conclusion—a lot of pressure from a very dynamic threat landscape, lessons learned from current cyber warfare, and legislation to encourage businesses to practise healthy cyber hygiene create a market opportunity for cooperation between governments and businesses to address the challenges.

Why cryptocurrency wallets security is not about blockchain but about application security and user education? What crypto wallets and banking apps have in common? Are they as secure as banking apps? In her new talk, Julia goes into details, risks and threats of crypto wallets, design concerns and implementation issues, and gives practical advice for developers who want to make their apps more secure.

In his talk for the OWASP Zhytomyr community, Artur uncovers solutions to practical security issues every security engineer faces. The mobile application landscape is constantly changing – developers use new frameworks, Google demands new requirements and security features. Artur demonstrates the latest setup of a lab environment for security testing of Android apps. He uses it to illustrate how different apps implement specific OWASP MASVS requirements — like certificate pinning or root protection. Artur shows where to look to spot the missing security controls.

As a keynote speaker of this flagship event by OWASP, Anastasiia explains how developers and companies use cutting-edge cryptography and data security approaches when no perimeters and trusted zones exist anymore. In this talk, she starts with data security 101 and gets you through peculiarities of application level encryption (ALE), end-to-end encryption (E2EE), searchable encryption, zero knowledge architectures and zero trust. She demonstrates real-world cases of integrating application level encryption and supporting traditional security controls to protect customers’ data. By the end of the talk, you can have a whole picture how “strong cryptography” becomes “real-world security boundary around sensitive data” and what it takes in different contexts.

Can React Native apps be secure? Is it a leaky abstraction? Julia went in details of React Native architecture, platform usage, and its dependencies. This security talk is designed specially for developers, decision-makers, and tech leads interested in addressing and preventing typical mistakes related to this cross-platform solution from Facebook.

The security challenge is to protect ML models from leakage and massive accumulation, which leads to reverse engineering of unique IP. In this talk, Anastasiia explains building DRM-like protection with application level encryption using HPKE-like approach on ephemeral keys. She discusses risks, threats, dataflow, cryptographic layer, key management and integration with traditional application security controls for defense-in-depth approach.

Secure architecture is about decision making. Learn from Julia how it differs from secure coding and what you can do for your developer team to achieve better results while following SSDLC.

Julia talks about US encryption export regulations - what they mean, which applications they affect, and what developers should do.

In this talk, Julia invites app devs and architects to explore common iOS vulnerabilities, outlines popular requirements from OWASP MASVS, enlists examples and paths to make applications more secure.

End-to-end encryption doesn’t guarantee privacy and/or security of your data. Your favourite application can use e2ee and sell data to someone at the same time. Anastasiia explained the relationship between security, privacy and encryption, and how different encryption approaches protect users data from various events or threats.

Julia unraveled security issues developers should keep in mind to implement SSDLC, gave clues to the secure authentication standards, and shared experience on how to avoid typical auth mistakes in iOS apps.

Anastasiia gave a small hardcore cryptographic session and covered usable cryptography and the scenarios which can help app developers to right up their ship in case of cryptography or data security tools misuse. Get in details why boring crypto is actually better than “fun” crypto.

Eugene talked about implementing sophisticated defences in constrained environments: ranging from protecting massive power grid SCADA networks to improving end-to-end encryption in small mobile applications. Technological stack doesn’t matter if you focus on the risk assets and design defences around asset lifecycle.

Eugene shared our experience and lessons learnt of building secure data aggregation systems with hardware-based encryption, time-series processing and end-to-end security. Learn about our solutions that are integrated into ICS/SCADA networks of industrial operators, extract sensitive data, encrypt it “on the fly” and process separately.

Public training on security and cryptography engineering conducted jointly by Anastasiia and Jean-Philippe. We focused on solving practical security engineering challenges rather than academic cryptography. We talked about SSDLC and risk management, cryptography and typical cryptographic mistakes, using and misusing APIs, building defence-in-depth for distributed applications.

Maintaining cross-platform cryptographic library is a journey full of unexpected bugs, language-specific hacks, difficult decisions and the endless struggle to make developer-facing APIs easy-to-use and hard-to-misuse. Anastasiia described the four years journey of designing and supporting Themis: from shaping cryptosystems, writing language wrappers to CICD pipelines, autotests and interactive documentation.

In this talk, Eugene tried to cross the bridge between modern DevOps/SRE practices, systems architecture design and traditional security/risk management. It is driven by lessons learnt from building systems the modern way in high-risk environments with high reliability and security demands, drawing from the experience of protecting governmental secrets, critical infrastructure and preventing banking fraud at scale..

How SQL firewalls can help to protect databases from SQL injections: the main difference from web application firewalls (WAFs), common usage scenarios, pros, and cons. We implemented SQL firewall as part of data encryption proxy Acra, and we will share insights about security and development decisions. Expect a story about parsing SQL protocols, matching rules, hidden dangers of logging, best of configuration and usage patterns.

We all know how open source is useful. In this talk, Eugene describes the obvious and not very obvious risks that open source brings with it and what are the practical consequences. Learn what you need to pay attention to when selecting components for your new spacecraft to protect it from exploding during takeoff.

Watch a story behind implementing end-to-end encryption for Bear application. Anastasiia explained the security engineering flow: protocol design, selecting cryptographic library, cryptocoding techniques, building defence-in-depth and preparing for incidents. Learn how to build an encryption engine for the app with 6M users.

The talk addresses the aspects and elements of API documentation that need to be reconsidered and restyled in the light of GDPR. The way things are, an absolute GDPR compliance is impossible, but maximal compliance is doable. Technical writers can enforce it through the language graphic elements that are used for guiding the users around the API portals.

Apple made many announcements on WWDC 2019 about cryptography, cybersecurity and privacy. Anastasiia highlighted important changes for developers – including new CryptoKit framework, data privacy regulations, new app permissions.

The search over encrypted data is the modern cryptographic engineering problem. We will talk about existing approaches (both well-known and modern), and concentrate on practical solution based on blind index technique to search data in databases. What’s inside: cryptographic and functional schemes, implementation details, practical security evaluation (risk modelling and potential attacks). We will show how theoretical models turn into real, usable, maintainable, security tools. Search over encrypted records is part of Acra encryption proxy.

“Defense in depth” is a security engineering pattern, that suggests building an independent set of security controls aimed at mitigating more risks even if the attacker crosses the outer perimeter. During the talk, Anastasiia modeled threats and risks for the modern distributed application, and improved it by building multiple lines of defence. She gave an overview of high-level patterns and exact tools how to build defense in depth for your distributed web applications.

Have you ever used dynamic libraries before? We’re sure you did. Alexei explains how OS loads dynamic libraries and how to load another library instead (using LD_PRELOAD hooks). As it’s easy to detect and mitigate LD_PRELOAD, Alexei digs deeper and talks about code injection on runtime. Learn how to use ptrace to search functions in a memory-mapped process and to manipulate the process’s state and thread execution.

A workshop for iOS developers that illustrates typical mistakes they do trying to implement security into their apps. Anastasiia showed an actionable to-do list of things developers might want to improve in their apps, and gave a set of key management techniques for mobile apps.

Dmytro Shapovalov, our senior infrastructure engineer, talks about improving the infrastructure for developing, testing, and delivering security tools. Our experience of smoothing the difference between security idealism and engineering friendliness.

Most modern applications live in a close cooperation with each other. Dmytro spoke about the ways to effectively use the modern techniques for monitoring the health of applications. Being an infrastructure engineer, Dmytro explain typical mistakes developers do when implement monitoring, and suggested a couple of approaches and tools that can help.

Making secure applications is not easy, especially when encryption tools are difficult and incomprehensible. Dmytro talked about typical data security problems in web apps and about proper implementation of encryption. Dmytro reviewed the cryptographic approaches and the exact tools that ensure that no sensitive data leaks from the application or the database.

Using cryptography for data protection is not exclusively reserved for “secure chats” and financial products. Modern cryptographic tools help to comply with the regulations and laws, help to improve control over the infrastructure, to prevent data leakages, and to reduce the risk of incidents. Eugene talked about the way modern cryptographic tools allow technology companies to reduce the security budget and to remain protected at the same time.

Who are the people in the “blue team” and how do they prevent business risks for company assets? What is secure development, secure architecture, secure coding? A lecture for Women in Appsec Kyiv community and infosec students.

Usability is often thought of as the opposite of security. However, most of the security controls inside operating systems and most of the security tools that run there are designed for being operated by humans. This talk is a summary of Eugene’s experience in building and seeing engineers integrate the security tooling – how security controls and tools are mis-designed and fail once used, how poorly integrated controls decrease the overall security of a system, and how lessons learned in reliability/infrastructure engineering apply to security tooling to fix that.

A talk for solution architects and technical leads, in which we took a deep look into data lifecycle, risk, trust, and how they affect security architecture, encryption, and key management techniques. We illustrated typical SDL patterns: narrowing trust, monitoring intrusions, zero knowledge architectures, distributing trust. The goal of the talk was to provide a general thinking framework and enough ideas about tools for senior engineers for them to be able to plan their solutions securely, in relation to the sensitive data inside.

A workshop for iOS developers that illustrates how to implement end-to-end encryption of Firebase notes application. Zero knowledge algorithms and protocols ensure that no keys, passwords, files, or any other sensitive material ever gets transferred in an unencrypted or reversible form. Workshop code contains two encryption schemes and set of general recommendations of improving security of any iOS application.

This is a story of going over the typical security challenges: how to build products that reliably deliver security guarantees, how to avoid the typical pitfalls, and how to create tools that could be usable and predictable for real users. It’s a tale of balancing religious adherence to security practices while keeping the customers’ needs in mind all the time, inside the development team; a story of listening to the customers and observing the actual user behaviour outside in the wild, and trying to make the best decisions when it comes to empowering the customers with easy tools for encrypting data in their apps, securely and without pain. Presented for senior software engineers at QConNYC.

What it takes to make security decisions in a business environment, from the perspectives of both vendor and client, urging security engineers not only to think outside the technical box but also outside the box of engineering thinking when faced with real humans on the other side of the wire. Presented for security engineers at NoNameCon.

A talk for Women Techmakers Lviv on creating and maintaining documentation for cryptographic software. Besides the issues of information security, such things as basic self-care and sanity were also brought up. This talk was also given in December 2017 at the one-day API The Docs Amsterdam conference.

A “tips and tricks” talk for mobile developers. Even when developers create apps with security in mind, (at least try to) protect user secrets, and don’t reveal unencrypted data, attackers can still find ways to bypass these security measures by exploiting architectural weaknesses and non-obvious, yet very simple vulnerabilities. The talk is about all the tiny bits and pieces that are necessary for making your app secure against simple attacks way before focusing on the hard things (like cryptography).

An in-depth technical inquiry about cryptography in a wider context: how it helps to narrow more significant risks to controllable attack surfaces, enables efficient and elegant risk management, and how tools and algorithms sit in a broader context of managing infrastructure-wide risks associated with handling the sensitive data.

Karen Sawrey, our technical writer, gave a talk on refactoring the existing GitHub documentation of our products and moving it to our own proprietary documentation server.

We co-organised a security meetup for Ukrainian companies to discuss the various technical aspects of GDPR. Our speakers gave two talks, outlining various aspects of GDPR demands and possible compliance tactics.

The talk focused on real-world problems that ZKA counters, typical cryptographic designs and progress in different spheres of ZKA. The talk also explained the practical approaches useful for mobile developers (implementing data sharing and user collaboration on data in a cloud in a way that makes a mobile app provably secure).

It often feels like distributed and federated services provide better resiliency, risk management, and privacy than typical star-topology systems. However, Facebook et al. provide and maintain huge, single-point-of-entry, solely owned, walled gardens with hostile privacy policies, and yet they successfully serve millions of users, attracting some of the best engineering talents along the way.

Trust is built around various trust tokens: keys, passwords, secrets, biometric properties, things you have and things you know. Key management is complicated when done the right way.

DevOps movement emerged as an attempt to build the bridge between people who write code, people who maintain the infrastructure for running it, and people who make the business decisions. These changes have put the emphasis on the new set of techniques and values. These techniques and values can either be beneficial or problematic for the security posture.

Our CTO’s talk on the evolution of end-to-end software, survival within the “everything will be broken” model with the help of employing proper cryptography and trust management, plus a disclosure of some ideas and concepts behind Hermes.

Our CTO’s talk about the classic and emerging threat models, a proper understanding of security risks, perception of technical infrastructures ranging from idealistic to realistic, and adopting stronger techniques in the face of the vanishing perimeter and the (sadly) lowering standards of security tools and overall quality of the produced software.

These are the slides that accompanied the talk of our core scientific contributor. The talk is focused on on evolving from regular authentication to Zero-Knowledge Proofs (including with Secure Comparator) at DefCon Crypto Village.