內容簡介
Bender 是一款專為 WordPress 設計的圖片保護外掛，透過馬賽克技術有效防止圖片被盜用，並不影響網站的 SEO、速度或使用者體驗。它自動為上傳的圖片生成馬賽克圖像和低解析度的簽名版本，確保原始圖片不被直接存取。
【主要功能】
• 自動保護上傳的圖片，無限制數量
• 生成 6×6 的馬賽克網格
• 可見的「Bender™」水印
• 預設的 IPTC 版權元數據
• 支援 WooCommerce 產品圖片保護
• 媒體庫中的批量保護/取消保護功能
外掛標籤
開發者團隊
② 後台搜尋「Bender – Mosaic Image Protection」→ 直接安裝（推薦）
原文外掛簡介
Your WordPress images travel as a mosaic. Whoever steals them finds only shuffled tiles.
Bender protects your site’s photos from scrapers, AI training bots, and outright theft, without touching SEO, speed, or the experience of your human visitors.
How it works
On upload (or from the Media Library), Bender automatically generates two derivatives for every image:
Mosaic atlas – the image in full resolution, with an N×N grid permuted and flipped via HMAC-SHA256 → Fisher-Yates using a per-image secret key. A single CDN-cacheable file: downloaded as-is, it’s an unreadable puzzle.
Signed low-res – a reduced version with a visible diagonal watermark and IPTC copyright metadata (read by Google Images), used as the source: SEO, social previews, and the no-JavaScript fallback.
The original hi-res URL never appears in the page markup. In the browser, Bender waits for the image to enter the viewport, downloads the atlas, requests the reconstruction map from a REST endpoint protected by a time-limited HMAC token, and reassembles the mosaic on a
HTML scrapers / mass bots — blocked: the HTML only contains the watermarked low-res
Right-click “Save image” — blocked: the canvas isn’t a file
Hi-res hotlinking — blocked: no plain hi-res URL exists
Downloading the atlas — useless: permuted, flipped tiles, no map
Map enumeration via REST — mitigated: time-limited HMAC token, per-IP rate limiting
Screenshots — not blockable, by any technology
That’s why Bender always signs, not just hides: visible watermarking and IPTC metadata make authorship provable even when a copy slips through.
WooCommerce
Product images are protected like any other image, and the product gallery is handled specifically: the zoom link and the gallery thumbnails serve the protected copy, so the original file is not reachable from the product page. Variation images, schema.org structured data and the Store API — the other places where WooCommerce prints image URLs — are covered by Bender Pro.
What’s included
This plugin is fully functional as-is, with no locked or restricted features:
Automatic protection on upload, unlimited images
6×6 mosaic grid
Visible “Bender™” watermark
Default IPTC copyright metadata
JPEG atlas format
Bulk protect/unprotect from the Media Library, with a protection status column and a protection filter in both list and grid mode
WooCommerce: the product gallery’s zoom link and thumbnails point at the protected copy, not at the original file
Denser grids, WebP/PNG atlas formats, fully customizable watermark and IPTC text, invisible forensic (LSB) watermarking, configurable token validity, and wider WooCommerce coverage (variation images, structured data, Store API) are available in Bender Pro, a separate plugin distributed outside WordPress.org. Bender Pro also leaves images unmarked: the “© protected” badge is off by default there, while here it is on by default (you can untick it in the settings).
