Regressive JPEGs turn progressive JPEG scans into frame-like state changes. By concatenating scan segments from compatible images (often DC-only to minimize scan budget), decoders may re-render as new scans arrive, creating an accidental “video” driven by network timing.
An “obfuscated bash script” on a UNIQLO × Akamai “PEACE FOR ALL” T‑shirt decodes into a harmless terminal animation. Learn how Base64, shebangs, and `eval` patterns work—and why safe decoding reveals the real Easter egg.
Claude Code can embed hidden classification markers inside a “Today’s date…” system prompt by swapping Unicode apostrophes and changing date separators. The logic activates via ANTHROPIC_BASE_URL, timezone, and hostname matching against decoded lists.