BART PRENEEL THESIS

Attacking an obfuscated cipher by injecting faults. Ran Canetti and Mayank Varia. Resources Slides March — slides PhD defense. 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. Research Academic research in white-box cryptography can be categorized into three activities. On the Im possibility of Obfuscating Programs. Similar theoretic approaches have been conceived for white-box cryptography in [Sax09].

Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. Shafi Goldwasser and Yael Tauman Kalai. Similar theoretic approaches have been conceived for white-box cryptography in [Sax09]. It makes sense to define white-box cryptography accordingly since it reflects more reality. Wyseur, and Bart Preneel: 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. Indeed, it does not suffice to only protect an application against extraction of embedded secret keys.

Nevertheless, this result does not exclude the existence of secure code obfuscators: Resources Slides March — slides PhD defense.

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Bart Preneel | SBA Research

Both have received similar scepticism on its feasibility and lack of theoretic foundations. Jan 13, version: Badt 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.

White-box implementations and cryptanalysis results A selection thexis 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.

bart preneel thesis

On the Im possibility of Obfuscating Programs. On Obfuscating Point Functions. 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. On the Impossibility of Prendel with Auxiliary Input.

White-box cryptography

Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. Attacking an obfuscated cipher by injecting faults. Research Academic research in white-box cryptography can be categorized into three activities.

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bart preneel thesis

Similar theoretic approaches have been conceived for white-box cryptography in [Sax09]. Shafi Goldwasser and Yael Tauman Kalai. Ran Canetti and Mayank Varia.

It makes sense to define white-box cryptography accordingly since it reflects more reality. A security notion is a formal description of the security of a cryptographic scheme.

Theory White-box cryptography is often linked with code obfuscation, since both aim to protect software implementations.

Whiteboxcrypto

Positive Results and Techniques for Obfuscation. Wee [Wee05] presented a provably secure obfuscator for a point function, which can be exploited in practice to construct authentication functionalities. Wyseur, and Bart Preneel: Obfuscation for Cryptographic Purposes.