Since 2020, Carrousel Digital has been committed to digital security by providing solutions to security flaws that are still overlooked. Carrousel Digital has therefore developed various processes to improve cybersecurity: these processes have been patented, testifying their novelty.
Can you provide details on the quantum-safe electronic signature?
Digital signatures are used to provide the authenticity of a document, i.e. for verifying that a document has not been altered in transit from its sender. Electronic signatures typically rely on digests of the document, which are then encrypted. However, Quantum computers are making these encryption functions vulnerable, for instance by recomputing the secret keys they use.
Random Hash signature from Carrousel Digital enables quantum-safe signing for very simple devices and existing computers; this signature uses secrets and, for encryption, one-time-keys that by essence cannot be decrypted, even by quantum computers.
The scheme can be used in many instances such as emails, or computer-to-computer communication.
The signature requires banks of one-time keys which are short random numbers, as it needs to use a new key for every different message. However, this is not an issue as this key can be relatively short and flash memory is abundant and cheap. For instance, 1GB of flash memory can store 250 million 32-bit keys, reducing the probability of a fake document going undetected to just 1 in 4 billion.
The processing required for the signature is also very simple requiring mostly hash functions, which are nowadays programmed in most chips, and in fact are already used for classical signatures.
