On Sora, your signature is not a drawn line like on other platforms: it is a cryptographic signature generated with a unique private key that only you know, protected by your PIN. This allows an expert to mathematically prove that only you could have created it, making it impossible to forge, even for Sora.

In this video, we explain why a cryptographic signature is more secure than a handwritten signature or a digital drawing, and what the signature sheet that accompanies each document contains: your identity verified against INE and RENAPO, the biometric fingerprint that confirms it is you, the exact timestamp, and the public key that links the signature to your identity. All backed by Articles 776 and 836-B of the Federal Labor Law, so that each signed document is legal evidence ready to be defended in court.