The team is focused on real time communication system development. The system supports calling vs. IP telephony, using SIP protocol, and instant messaging, using XMPP.- Software requirement specification elaboration for client-side.- The client-side architecture.- Technical consulting.- Developmental work and analysis of the client-side.- Code review.- Solving technically complex programming issues.- Testing the quality of voice nodes.- Solving interconnection problems between voice devices in a network. Analysis of protocols.- Introduction of principles for development and deployment of server-side nodes.- Development of a drawing algorithm for complex GUI-controls.Languages: MS Visual C++, C# 2005.Technologies: RTC, GDI+, MS XML, Windows Sockets.

Project management:- Project planning.- Resource management.- Work-plan control.- Project evolution management.Tools: MS Project 2003.

Security:- Analysis and control of authentication schemas for nodes of a network.- Development of by PIN authentication schema that hides a PIN during transfer over an open channel. The schema protects against reply attacks.- Design and implementation of IP-spoofing attacks that cause sheer loss to VoIP providers. Development of recommendations to avoid IP-spoofing attacks.- Accounting schemas testing for voice calls. Design of attacks that facilitate calls at the expense of others. Development of recommendations to avoid them.- Server-side security. Participation in the development of secure communication of server-side parts and other nodes of the network.- Design of Web-part security, ensuring confidentiality and privacy.Management and participation in research:- Research and solution of acoustic and electric echo problems in VoIP networks.- Management and participation in voice engine research for the client-side application. Solving compatibility problems between the voice engine and others nodes of a network.- Research of NAT and firewall traversal problems. Choosing an optimal NAT traversal strategy.Architecture and development of the core algorithm of an application that maintains voice gateways load balance (Soft Switch).- Research of the stochastic characteristics of voice gateway load intensity. Design of a voice gateway load intensity mathematical model, which depends on the simultaneous connection-lines quantity that supports each device.- Maximum allowed load determination per device.- Creating an algorithm that controls intensity and number of concurrent calls.Languages: MS Visual C++ 2005.Technologies: RTC, Windows Sockets.Servers: MS SQL Server 2000.Delivering a TV-signal in networks using the IP-multicast communication bypassing VPN connection.Languages: MS Visual C++ 2005.Protocols: IGMP, DHCP.

Participation in a team of 6. The team is focused on real time communication system development. The system supports calling vs. IP telephony and instant messaging.- Instant messaging service implementation.- Top-level window layout management system development.- Development of automatic system update.- GUI controls.Languages: MS Visual C++ 2003.Technologies: MS XML, TCP/IP.

Software cryptography engine development, which has following features: - GOST 28147-89 provides encryption/decryption and message authentication code generation.- GOST 34.311-95 provides evaluation of a hash function.- DSTU 4145-2002 provides a digital signature based on elliptic curves.- A software random number generator.The engine encryption schemas are based on Feistel’s structure.The digital signature is based on the elliptic curves theory. A Galois finite field extension is used as a base field for curve point operations. Extensive operations optimization was carried out during development.There is a theoretical proof that the random number generator gives a uniformly-distributed bit sequence.The engine has passed certification tests for accordance with CIS-wide and Ukrainian standards: GOST 28147-89, GOST 34.311-95, DSTU 4145-2002.Languages: MS Visual C++ 2003, Assembler.Technologies: MMX, SSE/SSE2, CAPI.Level of participation: full development.

Participation in a team of 10. Involvement in the development of a bank automation system integrating all banking operations.- Participation in cryptosystem development.- Implementation of a bank bill subsystem.- Windows forms components development for the product.- Integration and deployment of Crystal Reports.- Product deployment.- Researching ASP.NET as a report generation system.Architecture: A three tier system.Languages: C#, Managed C++, MS T SQL, HTML/DHTML.Technologies: .NET Remoting, ADO.NET, ASP.NET, Windows Forms, XML, GUI, COM/COM+, Windows Script Engine, CAPI, MSI, WMI, ADSI.Servers: MS SQL Server 2000, IIS.Development of a product restoration system. The system makes a product content snapshot and restores the product content at any time.Languages: MS Visual C++ 2002.Technologies: MFC, ATL, GUI, MSI, WMI.Level of participation: full development.