BART PRENEEL PHD THESIS

Positive Results and Techniques for Obfuscation. Obfuscation for Cryptographic Purposes. It makes sense to define white-box cryptography accordingly since it reflects more reality. Indeed, it does not suffice to only protect an application against extraction of embedded secret keys. On the Im possibility of Obfuscating Programs. Nevertheless, this result does not exclude the existence of secure code obfuscators:

It makes sense to define white-box cryptography accordingly since it reflects more reality. Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. 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. Ran Canetti and Mayank Varia. Similar theoretic approaches have been conceived for white-box cryptography in [Sax09]. Research Academic research in white-box cryptography can be categorized into three activities. On the Impossibility of Obfuscation with Auxiliary Input.

For example, to create the equivalent of a smart-card-based AES encryption function in software, it does thess suffice that the white-box implementation resists extraction of its embedded key, but it must also be hard to invert. Both have received similar scepticism on its feasibility and lack of theoretic foundations.

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White-box cryptography

Shafi Goldwasser and Yael Tauman Kalai. Wee [Wee05] presented a provably secure obfuscator for a point function, which can be exploited in practice to construct authentication functionalities.

Research Academic research in white-box cryptography can be categorized into three activities. On the Impossibility of Obfuscation with Auxiliary Input.

Jan 13, version: Nevertheless, this result does not exclude the existence of secure code obfuscators: ITCC 1pages Similar theoretic approaches have been conceived for white-box cryptography in [Sax09]. Chand Gupta, and G.

Whiteboxcrypto

Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. Positive Results and Techniques for Obfuscation. It makes sense to define white-box thrsis accordingly since it reflects more reality.

bart preneel phd thesis

Wyseur, and Bart Preheel A security notion is a formal description of the security of a cryptographic scheme. 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.

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bart preneel phd thesis

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. Obfuscation for Cryptographic Purposes. Attacking an obfuscated cipher by injecting faults.

Resources Slides March — slides PhD defense. Ran Canetti and Mayank Varia. White-box implementations and cryptanalysis results A selection of the state of the art: Theory White-box cryptography is often linked with code obfuscation, since both aim to protect software implementations.

On the Im possibility of Obfuscating Programs.

bart preneel phd thesis

Indeed, it does not suffice to only protect an application against extraction of embedded secret keys. On Obfuscating Point Functions.