BART PRENEEL PHD THESIS

Nevertheless, this result does not exclude the existence of secure code obfuscators: For example, to create the equivalent of a smart-card-based AES encryption function in software, it does not suffice that the white-box implementation resists extraction of its embedded key, but it must also be hard to invert. Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. White-box implementations and cryptanalysis results A selection of the state of the art: Indeed, it does not suffice to only protect an application against extraction of embedded secret keys.

For example, a scheme is defined CPA-secure if an attacker cannot compute the plaintext from a given ciphertext, or KR-secure when the secret key cannot be recovered. On the Impossibility of Obfuscation with Auxiliary Input. Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. For example, to create the equivalent of a smart-card-based AES encryption function in software, it does not suffice that the white-box implementation resists extraction of its embedded key, but it must also be hard to invert. Chand Gupta, and G.

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Obfuscation for Cryptographic Purposes. Nevertheless, this result does not exclude the existence of secure code obfuscators: On Obfuscating Point Functions. Positive Results and Techniques for Obfuscation.

Bart Preneel | SBA Research

Both have received similar scepticism on its feasibility and lack of theoretic foundations. A security notion is a formal description of the security of a cryptographic scheme.

bart preneel phd thesis

Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. Jan 13, version: The main difference between code obfuscation and white-box cryptography is that the security of the latter needs to be validated with respect to security notions. Ran Canetti and Mayank Varia.

Research Academic research in white-box cryptography can be categorized into three activities. On the Im possibility of Obfuscating Programs.

Whiteboxcrypto

Shafi Goldwasser and Yael Tauman Kalai. Resources Slides March — slides PhD defense. Theory White-box cryptography is often linked with code obfuscation, since both aim to protect software implementations.

bart preneel phd thesis

It makes sense to define white-box cryptography accordingly since it reflects more reality. ITCC 1pages For example, to create the equivalent of a smart-card-based AES encryption function in software, it does not suffice that the white-box implementation resists extraction of its embedded key, but it must also be hard to invert. Wyseur, and Bart Preneel: Similar theoretic approaches have been conceived for white-box cryptography in [Sax09].

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bart preneel phd thesis

Indeed, it does not suffice to only protect an application against extraction of embedded secret keys. White-box implementations and cryptanalysis results A selection of the state of the art: On the Impossibility of Obfuscation with Auxiliary Input. Attacking an obfuscated cipher by injecting faults.

For example, a scheme is defined CPA-secure if an attacker cannot compute the plaintext from a given ciphertext, or KR-secure when the secret key cannot be recovered.

Wee [Wee05] presented a provably secure obfuscator for a point function, which can be exploited in practice to construct authentication functionalities. Chand Gupta, and G.