Description: A lattice-based signature is a digital signature scheme that relies on hard problems in lattice theory for its security. Unlike traditional digital signature methods, which typically depend on public key cryptography based on mathematical problems such as integer factorization or discrete logarithm, lattice-based signatures utilize complex problems related to lattice theory, such as the shortest vector problem (SVP) or the closest vector problem. These signatures offer a promising alternative in the field of cryptography, especially in the context of quantum computing, where traditional methods may become vulnerable. The main features of lattice-based signatures include their resistance to quantum attacks, efficiency in terms of signature size, and speed in verification. Additionally, these signatures allow for the creation of aggregated and multisignature schemes, making them versatile for various applications. Their relevance in public key infrastructure lies in their ability to provide a robust level of security in a world where the threat of quantum computing is becoming increasingly real, thus ensuring the integrity and authenticity of data in digital environments.
