Elias Levy, aka Aleph One, was the moderator of the mailing list Bugtraq from May, 1996 until he stepped down in October, 2001. Through BugTraq, Levy has helped educate countless system administrators, network engineers and developers across the planet, and helped changed the way an entire industry does business in regards to bugs and vendor response.
In addition to his work with Bugtraq, he was also the CTO and co-founder of SecurityFocus, and author of "Smashing The Stack For Fun and Profit"which was published in Phrack Magazine issue #49. "Smashing The Stack" was the first high-quality, step-by-step introduction to stack buffer overflow vulnerabilities and exploitation, sparking numerous attacks and defenses against them.