Hacker News new | past | comments | ask | show | jobs | submit login

Also, when blacking out data from JPEGs, leave generous margins, because there may be compression artifacts in the nearby pixels that also act effectively as a one-way hash. I haven't tested how consistent these artifacts are, but it's better to be safe than sorry.

Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | Legal | Apply to YC | Contact