Security
图片隐写术：嵌入与检测
把文字藏进 PNG 的最低有效位、再原样提取，并运行 Westfeld–Pfitzmann 卡方隐写分析（含滑窗 p 曲线与 LSB 位平面预览）。
html· HTML 结果打开工具
快速开始
用三种语言从你的代码中调用此工具。
cURL
# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-steganography-embed-detect' \
-H 'Content-Type: application/json' \
-d '{"filename":"imageFile.ext","contentType":"application/octet-stream","size":12345}'
# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
--data-binary @/path/to/file.ext
# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/zh/api/tools/image-steganography-embed-detect' \
-F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'mode=embed' \
-F 'secretText=Meet at the old harbor at 9pm — bring the blue key.' \
-F 'scatterSeed=harbor-2026' \
-F 'channels=rgb' \
-F 'skipTransparent=true'