Information security consultant, author, and instructor with 45 years experience in telecom & IT and 25 years in information security and applied cryptography.Solid experience in electronic payment systems, cryptographic software and hardware, secure communication systems, public key infrastructures (PKIs), and critical infrastructure protection.Co-author of one of the first white papers in Brazil on digital certificates and digital signatures (1997-1998). BRISA's Security Forum coordinator (1999-2000). Information security columnist for the Webinsider portal (1998-2001).Co-author of five patents, one related to a cryptographic protocol for secure off-line communication between smart cards (INPI/Brazil, 2008) and the other four on methods and systems for critical infrastructure protection (INPI/Brazil, 2009/2010).Architect of the Secure System for Electronic Message Interchange (Postalis), messaging software used by CPqD employees, partners and clients.Project leader and architect of a web-based application for information sharing among investors during the privatization of the Brazilian telecommunication system. Former participant of CCITT (now UIT-T), CITEL (Organization of American States), ABNT, and PBQP working groups.Specialties: PKI technology & applications; critical infrastructure protection; cryptographic systems specification, design, and evaluation; cryptographic services and security planning for Software Defined Radio (SDR) systems.