10 attack vectors ordered by difficulty. Canary phrases are hidden — only revealed after analysis.
# 1 HTML Comment Instructions hidden in HTML comments, invisible to rendered page but present in source. Basic
# 2 White on White Text styled to be invisible against the page background using matching colors. Basic
# 3 Hidden Div A div set to display:none contains instructions that are invisible to users. Medium
# 4 Micro Text Extremely small, nearly transparent text woven into legitimate content. Medium
# 5 Aria Hidden Content marked as aria-hidden, intended to be ignored by assistive tech but read by agents. Medium
# 6 Data Attribute Instructions embedded in custom HTML data attributes on page elements. Medium
# 7 Zero-Width Characters Instructions encoded using zero-width Unicode characters invisible to the human eye. Hard
# 8 Image Alt Override A decorative image with alt text containing system-level instructions. Hard
# 9 Off-Screen Content Content positioned thousands of pixels off-screen, invisible but in the DOM. Hard