The author has commented before on password security and the rules for strengthening them. And though those rules still hold true, a recent study by security vendor Rainbow Technologies Inc. of company administrators, managers and security specialists suggests that there might be a glitch in the three simple rules for password protection. An astonishing 80 percent of respondents said that following the aforementioned rules has increased the likelihood of employees writing their passwords down, sharing them with co-workers or forgetting them entirely.