Daniel J. Bernstein
"djb" redirects here. "DJB" is also IATA code
IATA code
IATA codes are abbreviations that the International Air Transport Association publishes to facilitate air travel. They are typically 1-, 2-, 3-, or 4-character combinations that uniquely identify locations, equipment, companies, and times to standardize international flight operations...

 for Sultan Thaha Airport
Sultan Thaha Airport
Sultan Thaha Airport is an airport in Jambi City in the Jambi province of Indonesia. Located in the Paalmerah suburb of Jambi it has 73 flights departing per week for short haul destinations and 42 medium sized aircraft departing each week...

 in Jambi, Indonesia
Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

Daniel Julius Bernstein (sometimes known simply as djb; born October 29, 1971) is a mathematician
A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....

, cryptologist, programmer
A programmer, computer programmer or coder is someone who writes computer software. The term computer programmer can refer to a specialist in one area of computer programming or to a generalist who writes code for many kinds of software. One who practices or professes a formal approach to...

, and professor
A professor is a scholarly teacher; the precise meaning of the term varies by country. Literally, professor derives from Latin as a "person who professes" being usually an expert in arts or sciences; a teacher of high rank...

 of mathematics at the University of Illinois at Chicago
University of Illinois at Chicago
The University of Illinois at Chicago, or UIC, is a state-funded public research university located in Chicago, Illinois, United States. Its campus is in the Near West Side community area, near the Chicago Loop...

. He is the author of the computer software
Computer software
Computer software, or just software, is a collection of computer programs and related data that provide the instructions for telling a computer what to do and how to do it....

 programs qmail
qmail is a mail transfer agent that runs on Unix. It was written, starting December 1995, by Daniel J. Bernstein as a more secure replacement for the popular Sendmail program...

, publicfile, and djbdns
The djbdns software package is a DNS implementation created by Daniel J. Bernstein due to his frustrations with repeated BIND security holes. A $1000 prize for the first person to find a privilege escalation security hole in djbdns was awarded in March 2009 to Matthew Dempsky., djbdns's tinydns...

Bernstein earned his bachelor's degree in mathematics from New York University
New York University
New York University is a private, nonsectarian research university based in New York City. NYU's main campus is situated in the Greenwich Village section of Manhattan...

 (1991) and has a PhD in mathematics from the University of California, Berkeley
University of California, Berkeley
The University of California, Berkeley , is a teaching and research university established in 1868 and located in Berkeley, California, USA...

 (1995), where he studied under Hendrik Lenstra
Hendrik Lenstra
Hendrik Willem Lenstra, Jr. is a Dutch mathematician.-Biography:Lenstra received his doctorate from the University of Amsterdam in 1977 and became a professor there in 1978...


"So it's tempting to incorporate a smaller resolver library into qmail. [...] I'd no longer be able to blame the BIND authors and vendors for the fact that attackers can easily use DNS to steal mail." [From the file "THOUGHTS" of the qmail distribution]