This paper proposes a solution for information security of the integrated banking business system under the national data concentration environment, and introduces the architecture, main functions and key technologies of the information security system, including hierarchical key management, data authentication code, message authentication code, teller and customer identity authentication. The system has been implemented in the N21-Core Bank system of a national data concentration project of a state-owned commercial bank, and the operation effect is good. Keywords: information security; key management; data authentication code; message authentication code; shared memory
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