Cristian Sandu

Blockchain Developer Cegeka Romania


I am an experienced (and passionate) C++ developer with a background in both mobile and desktop development. I am interested in cryptocurrencies, 3D printing and of course software development.

I joined Cegeka as a blockchain developer in May of 2015 following my interest in cryptocurrencies. During this time, I have worked on several projects for the financial world involving blockchain solutions (using Ripple and Ethereum).

Previously I worked for the game company Gameloft as an iOS technical lead where my attributions included finding smarter ways to block game cracks and cheaters.

I have been a loyal DefCamp attendee for the past 3 years and I think it’s getting cooler every year.

Security of Mobile Cryptocoin Wallets

With mobile devices offering more and more hardware security options it has become interesting to implement secure cryptocurrency wallet apps on iOS and Android(Bitcoin and altcoins but not only).

For iOS the most attractive solution is the Secure Enclave which has been added in hardware starting with the iPhone 5s(Apple A7 chip). The Secure Enclave allows for on chip signing of transactions without ever exposing the private key but that presents some unique challenges which we will detail in the paper.

In this presentation we introduce a practical implementation of transaction signing on an iOS device using the Secure Enclave in a manner which never exposes the private key.

Are you the next cyber security superstar?

If you are passionate about an information security topic or you have strong technical skills developing researches on your own, you should definitely Apply at Call for Papers. By submitting you will have the chance to showcase your work to +2000 attendees.

Other speakers joining this year

Stefan Tanase

Senior Security Researcher Kaspersky Lab Global Research & Analysis Team

Mihai Neagu

Senior Proactive Detection Researcher Bitdefender

Cristian Pațachia-Sultănoiu

Manager of Development & Innovation Team Orange Romania

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Orange Romania is the leader of the local telecom market and part of the Orange Group, one of the largest global telecommunications operators, connecting hundreds of millions of customers worldwide. With over 11 million customers and an annual turnover exceeding 1.5 billion euros, Orange Romania connects 1 in 2 Romanians and offers an extensive range of communication solutions to its customers, both individual users and companies, from basic services up to complete voice services, fixed and mobile data, TV services or smart home services, but also mobile financial services. Orange is also a leader in innovation investing yearly over 200 million euros in network infrastructure and R&D initiatives in Romania. In the past 3 years Orange has launched two 5G Labs in Bucharest and Iasi, that aim to support researchers, startups and companies to test their 5G solutions in advance. In addition, Orange is a long-term supporter of the startup ecosystem through the Orange Fab accelerator program designed to support entrepreneurs in the development of innovative products and their distribution locally and internationally. 

Orange Services was created in 2013 and is a 100% owned subsidiary of Orange Group. As a technology services company, our DNA is in IT, but our teams also work in other domains including mobile networks and a number of commercial and business functions. Orange Services is one of the largest technology hubs in the Orange Group, working internationally for both Orange corporate functions and country operations. Through a unique combination of cutting edge know-how and expertise, our teams provide a broad range of services: development and supervision of IT services in domains such as Big Data, Cloud, M2M, IoT, TV, Connected Objects; design and development of IT infrastructure and desktop solutions; testing & planning for mobile networks; implementation of supply chain solutions and also improvement of commercial & business performance including BI, CRM, Analytics, Digital learning and Customer Care. Visit us on LinkedIn.

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