A computerized system and method for obtaining a post-quantum security scheme, generating a one-time use signing key split into shares, each share of the one-time use signing key is stored in one computerized device of the multiple computerized devices, generating shares of a verification key using a function receiving a share of the signing key, generating a data structure, where each node of the data structure is associated with a share of the verification key, signing a message using the shares of the one-time use signing key, revealing the share of the verification key, and reconstructing at least a portion of the data structure to validate that the revealed share of the verification key is associated with the correct node of the data structure.