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PrivacyKit
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Security & Crypto ✓ 사용 가능

Image Steganography: Hide Secret Message in Photo

Invisibly encode secret text, passwords, and private messages into PNG or JPG images using Least Significant Bit (LSB) pixel steganography. Includes optional password encryption with zero visual distortion.

LSB Pixel Encoding Password Protected Zero Visual Loss 100% In-Browser
PNG 또는 JPG 이미지 드래그 앤 드롭

최대 10MB 권장 • 화질 손상 없음

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⚙️ 이 도구의 로컬 작동 원리

PrivacyKit에서 이 도구를 사용할 때 모든 데이터는 사용자 기기의 RAM 내에서 직접 처리됩니다.

  • 1. 네트워크 통신 0%: 외부 서버로 어떠한 HTTP POST/PUT 요청도 전송되지 않으며, 인터넷 없이도 작동합니다.
  • 2. 최신 브라우저 네이티브 API: HTML5 Canvas, Web Cryptography(SubtleCrypto) 및 클라이언트 바이너리 파서를 활용합니다.
  • 3. 데이터 흔적 없음 (Zero Footprint): 브라우저 탭을 닫는 즉시 메모리 버퍼가 해제되며, 쿠키나 캐시가 남지 않습니다.

💡 자주 묻는 질문 (FAQ)

What is image steganography?

Steganography is the art of concealing confidential data inside an ordinary file. Unlike regular encryption where the ciphertext looks scrambled, steganography hides the message so nobody even suspects a secret exists.

How does LSB (Least Significant Bit) steganography work?

Every pixel consists of Red, Green, and Blue color values from 0 to 255. The tool modifies only the last bit of each color byte. Because human eyes cannot detect a 1/255 difference in color shade, the image appears 100% unchanged.

Can I add a password to my hidden message?

Yes. You can optionally set a password. The message is encrypted before embedding, meaning even someone who runs a steganography extractor cannot read it without your password.

What image format should I use?

Always export and share as lossless PNG. If an image is converted to lossy JPG, JPEG compression algorithms may corrupt the hidden bits.

Are my photos uploaded to PrivacyKit servers?

Never. Pixel reading, bitwise manipulation, and decoding happen 100% in your local browser JavaScript engine.