Peter Gutmann (computer scientist)

He has also written on his career as an "arms courier" for New Zealand, detailing the difficulties faced in complying with customs control regulations with respect to cryptographic products, which were once classed as "munitions" by various jurisdictions including the United States.

[6] In an article[7] written on September 1, 2007, George Ou offers a rebuttal to Gutmann's statements on Windows Vista.

This garnered criticism from audiences who didn't trust the primary use of secondhand information for detailed data, which was often found on forums.

When the quality of Gutmann's research came into question, George Ou himself tested certain assertions from the white paper.

He found significant differences between what was reported to be true and what was revealed to occur when performed firsthand, and failed to reproduce multiple alleged results in his own tests.