On the Impossibility of Obfuscation with Auxiliary Input. Jan 13, version: 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. 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. Chand Gupta, and G. Obfuscation for Cryptographic Purposes.

Attacking an obfuscated cipher by injecting faults. Ran Canetti and Mayank Varia. Positive Results and Techniques for Obfuscation. Resources Slides March — slides PhD defense. Research Academic research in white-box cryptography can be categorized into three activities. A security notion is a formal description of the security of a cryptographic scheme.

On Obfuscating Point Functions. Wee [Wee05] presented a provably secure obfuscator for a point function, which can be exploited in practice to construct authentication functionalities.

For thess, 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. 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.

It makes sense to define white-box cryptography accordingly since it reflects more reality. Both have received similar scepticism on its feasibility and lack of theoretic foundations.

Obfuscation for Cryptographic Purposes. Wyseur, and Bart Preneel: On the Im possibility of Obfuscating Programs. White-box implementations and cryptanalysis results A selection of the state of the art: For theiss, 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.

## Whiteboxcrypto

On the Impossibility of Obfuscation with Auxiliary Input. Chand Gupta, and G. A security notion is a formal description of the security of a cryptographic scheme.

Positive Results and Techniques for Obfuscation. Attacking an obfuscated cipher by injecting faults. Resources Slides March — slides PhD defense.

Research Academic research in white-box cryptography can be categorized into three activities. Indeed, it does not suffice to only protect an application against extraction of embedded secret keys.

Shafi Goldwasser and Yael Tauman Kalai. ITCC 1pages Ran Canetti and Mayank Varia.

# Bart Preneel | SBA Research

Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. Jan 13, version: Nevertheless, this result does not exclude the existence of secure code obfuscators: Theory White-box cryptography is often linked with code obfuscation, since both aim to protect software implementations.

Similar theoretic approaches have been conceived for white-box cryptography in [Sax09].