CRITTOGRAFIA POST-QUANTUM: ADOZIONE SPERIMENTALE DI UNO SCHEMA DI FIRMA BASATO SU HASH SENZA STATO IN UN CONTESTO MOBILE MULTI-PIATTAFORMA ATTRAVERSO IL FRAMEWORK FLUTTER

The advent of quantum computing has made traditional encryption methods vulnerable to new types of attacks, therefore requiring the adoption of post-quantum encryption algorithms to ensure the long-term security of digital communications. The objective of this thesis is to analyze the importance of adopting post-quantum cryptography, also on mobile devices, with a focus on the challenges and opportunities such integration presents, and to provide a ready-to-use solution. After discussing the need for more advanced cryptographic techniques to protect digital communications in a post-quantum era, it provides an overview of the technologies employed and the methodologies adopted to implement SPHINCS+, the signature scheme recently standardized by NIST as SLH-DSA, in a cross-platform environment such as Flutter's, which will allow it to be adopted on Android, iOS, Windows, MacOS and Linux.