email: xxx https://marakew.github.io/ https://github.com/marakew/ https://gitlab.com/marakew/ City, Country very old online cv Summary: Software R&D researcher with expirience in telecomunication technology Also expirience in reverse engineering and debugging Key Skills: Reverse Enineering x86/x64/arm/aarch64/ppc{32,64},mips{32}, IDAPro/HexRays decompiler C/C++ Developer Network Developer IPTV/VoIP/P2P many protocols and proprietary too, like (skype, btlive, ...) Network Programing with even driven architecture Low Level Programing AV Streaming Debugging Experience: Education: 1996-09 2003-02, National Technical University of Ukraine 'Kharkov Polytechnic Institute' Specialist's degree, Computer Science Publication: Skype architecture from the inside and its transport protocols 2015 yr skype research rus skype research eng skype research rus(web archive orig) skype research eng(web archive orig) precise RTMP protocol by reverse engineering 2018 yr https://en.wikipedia.org/wiki/Real-Time_Messaging_Protocol Project: 1. billing based radius server (for dialup & VPN) 2004 yr sourcecode * mysql store database * user (deposit, credit, block, ip, prefix) * group (hourgroup, trafgroup, holiday, traffic-limit) * password store: clear text - (pap, chap-md5, chap-ms1, chap-ms2), nthash - (chap-ms1, chap-ms2) * supported: Attribute Session-Octets, Session-Direction, Alive packet * supported: mppe(40/56/128bit) returned key at Radius-Attribute * supported: NAS on/off case * PHP interface for admin/user 2. Skystar satellite driver 2004 yr sourcecode at freshports.org * porting driver from linux to freebsd * adding some improves from windows driver by revers engineeging 3. TechoTrend Budget satellite driver 2007 yr sourcecode at freshports.org * revers engineering from windows driver * use C++ for write freebsd driver 4. improve video VESA driver in freebsd for x64 arch 2009 yr sourcecode forum freebsd commit 5. SIP MCU HD video conference phone/server 2013 yr release * based on old linphone version * up to 9 simultaneous participants * H264,VP8 * phone/server mode * server - accept only remote SIP+RTP connection * phone - extend server mode to use local audio and video input/output(webcam,mic,screen), and make a call 6. AvProxy IPTV simple proxy HTTP(S)/HLS(S)(AES-128)/RTP/UDP + VOD, MPTS/T2MI(PLP) demux 2015-2021 yr release * simple IPTV proxy, small, faster, compact * available protocols http(s)/hls(s)/rtp/udp + vod * basic/digest auth for ingress url * AES-128 for hls(s) inputs * MPTS/T2MI(PLP) demux 7. new syser debugger by reverse engineering 2017/2020-2021 yr release forum * reverse engineering old syser win32 debugger * improve handle x64 arch and fix some bugs