According to a study by Web-focused security firm White Hat Security last year, at least two-thirds of sites suffer from some form of the vulnerability.

FORBES: Magazine Article

Sandboxed or not, the security of Chrome's users will depend on who finds those bugs first, says Web security guru and White Hat Security Chief Technology Officer Jeremiah Grossman.

FORBES: Magazine Article

My own estimate is that there are about 10, 000 white hat security researchers working full time to counter malware (100 vendors X 50 average and double that for independents.) I am still working on an estimate of the number arrayed on the other side of this battle ground.

FORBES: Battleground Cyberspace: Hackers vs. White Hats

But those rules still offer a few important rights to fliers, as outlined in this helpful PDF created by a "white-hat" hacker, graduate student and security researcher who goes by the name "Sai" and has made a serious vocation of digging into TSA minutiae.

FORBES: Security

But Twitter has since worked to beef up its security, in part through adding well-known white-hat hackers to its staff such as cryptography-focused Moxie Marlinspike and former NSA analyst Charlie Miller.

FORBES: Twitter Says Hackers May Have Compromised 250,000 Accounts

Teso isn't the first so-called "white hat" hacker to expose what appear to be holes in air-traffic security.

CNN: Hacker says phone app could hijack plane