A segment-block-based handwritten signature authentication system, the system comprising: a handwritten signature input unit that includes a touch input unit that is configured to output touch data, as a handwritten signature input data, including position data and pressure data with respect to positions that are touched by a signer for handwritten signature; an enrollment unit that is configured to enroll handwritten signature characteristics information of each signer; and a handwritten signature authentication unit that is configured to generate a handwritten signature image and segment images by identifying a handwritten signature of the signer and recognizing segments disjointed by the signer from the handwritten signature input data entered from the handwritten signature input unit, to generate both a handwritten signature block including the handwritten signature and segment blocks (2-1, 2-2, 2-3, 2-4) containing the segments wherein the segment blocks are polygonal blocks, to collect handwritten signature characteristics information (Σ) including each segment block information, handwritten signature block information, correlation information between the segment blocks, and correlation information between each segment block and the handwritten signature block, wherein correlation information includes intersection space ratio information, segment block inclusion relation information (O ij), segment block positional relation information (POS ij), and segment block edge positional relation information (EDGE ij), to map the collected handwritten signature characteristics information to identification information of the signer, to enroll the collected handwritten signature characteristics information in the enrollment unit, to collect handwritten signature characteristics information (Σ) including correlation information between the segment blocks and correlation information between each segment block and the handwritten signature block from the touch data entered through the touch input unit of the handwritten signature input unit upon request for handwritten signature authentication, to load the enrolled handwritten signature characteristics information (Σ') that corresponds with the identification information of the signer who requests handwritten signature authentication, and and to perform a segment-block-based handwritten signature authentication according to a match rate by comparing the enrolled handwritten signature characteristics information (Σ') with the collected handwritten signature characteristics information (Σ). a handwritten signature input unit that includes a touch input unit that is configured to output touch data, as a handwritten signature input data, including position data and pressure data with respect to positions that are touched by a signer for handwritten signature; an enrollment unit that is configured to enroll handwritten signature characteristics information of each signer; and a handwritten signature authentication unit that is configured to generate a handwritten signature image and segment images by identifying a handwritten signature of the signer and recognizing segments disjointed by the signer from the handwritten signature input data entered from the handwritten signature input unit, to generate both a handwritten signature block including the handwritten signature and segment blocks (2-1, 2-2, 2-3, 2-4) containing the segments wherein the segment blocks are polygonal blocks, to collect handwritten signature characteristics information (Σ) including each segment block information, handwritten signature block information, correlation information between the segment blocks, and correlation information between each segment block and the handwritten signature block, wherein correlation information includes intersection space ratio information, segment block inclusion relation information (O ij), segment block positional relation information (POS ij), and segment block edge positional relation information (EDGE ij), to map the collected handwritten signature characteristics information to identification information of the signer, to enroll the collected handwritten signature characteristics information in the enrollment unit, to collect handwritten signature characteristics information (Σ) including correlation information between the segment blocks and correlation information between each segment block and the handwritten signature block from the touch data entered through the touch input unit of the handwritten signature input unit upon request for handwritten signature authentication, to load the enrolled handwritten signature characteristics information (Σ') that corresponds with the identification information of the signer who requests handwritten signature authentication, and and to perform a segment-block-based handwritten signature authentication according to a match rate by comparing the enrolled handwritten signature characteristics information (Σ') with the collected handwritten signature characteristics information (Σ).