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. 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. Shafi Goldwasser and Yael Tauman Kalai. Attacking an obfuscated cipher by injecting faults. Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al. On the Impossibility of Obfuscation with Auxiliary Input.

Jan 13, version: Wee [Wee05] presented a provably secure obfuscator for a point function, which can be exploited in practice to construct authentication functionalities. Resources Slides March — slides PhD defense. On the Im possibility of Obfuscating Programs. Nevertheless, this result does not exclude the existence of secure code obfuscators: ITCC 1 , pages

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

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. Nevertheless, this result does not exclude the existence of secure code obfuscators: Shafi Goldwasser and Yael Tauman Kalai.

# White-box cryptography

Chand Gupta, and G. Attacking an prenewl cipher by injecting faults. Positive Results and Techniques for Obfuscation. Theoretic research on code obfuscation gained momentum with the seminal paper of Barak et al.

## Bart Preneel

Resources Slides March — slides PhD defense. It makes sense to define white-box cryptography accordingly since it reflects more reality.

Ran Canetti and Mayank Varia. A security notion is a formal description of the security of a cryptographic scheme.

## Whiteboxcrypto

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. 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.

Jan 13, version: On Obfuscating Point Functions. 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.

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

Wyseur, and Bart Preneel: Obfuscation for Cryptographic Tthesis. Indeed, it does not suffice to only protect an application against extraction of embedded secret keys.

On the Impossibility of Obfuscation with Auxiliary Input. ITCC 1pages Research Academic research in white-box cryptography can be categorized into three activities. Both have received similar scepticism on its feasibility and lack of theoretic foundations.

On the Im possibility of Obfuscating Programs.