We present Invisible Encryption, a cryptographic protocol that camouflages the sharing of a secret within standard encrypted traffic to avoid detection in monitored environments. This paper introduces Invisible Encryption, a novel protocol integrating threshold secret sharing, steganography, and public-key cryptography to enable covert communication. By embedding a secret share within standard encrypted traffic, specifically by disguising it as a session key or nonce in a hybrid encryption scheme, our method ensures that the transmission of the secret remains undetectable. The secret is reconstructed from shares derived from a public natural language text and the transmitted share, with the selection of shares protected by a secret seed. We provide a formal security analysis, demonstrating that Invisible Encryption achieves confidentiality and plausible deniability under standard cryptographic assumptions. Invisible Encryption offers a robust solution for applications that require secure, undetectable communication, such as censorship-resistant systems and whistleblower protection.

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Invisible Encryption

  • Shahzad Ahmad,
  • Stefan Rass,
  • Zahra Seyedi

摘要

We present Invisible Encryption, a cryptographic protocol that camouflages the sharing of a secret within standard encrypted traffic to avoid detection in monitored environments. This paper introduces Invisible Encryption, a novel protocol integrating threshold secret sharing, steganography, and public-key cryptography to enable covert communication. By embedding a secret share within standard encrypted traffic, specifically by disguising it as a session key or nonce in a hybrid encryption scheme, our method ensures that the transmission of the secret remains undetectable. The secret is reconstructed from shares derived from a public natural language text and the transmitted share, with the selection of shares protected by a secret seed. We provide a formal security analysis, demonstrating that Invisible Encryption achieves confidentiality and plausible deniability under standard cryptographic assumptions. Invisible Encryption offers a robust solution for applications that require secure, undetectable communication, such as censorship-resistant systems and whistleblower protection.