Aiming at the problem of accounting information security under the financial co-working mode, this paper proposes a data integrity verification algorithm based on big data analysis. The intelligent accounting cloud platform based on cloud computing is analyzed to build the overall system architecture and the network topology of cloud storage data. A single-audit scheme based on the encryption-evidence chain algorithm is proposed, which uses the ZSS short signature algorithm to calculate the labels of data chunks, and improves the verification efficiency through bilinear pairs and generalized cryptographic hash functions. Simulation tests and experimental results based on the AliCloud platform show that all five algorithms can complete the corresponding data processing work in a short time. When verifying 500 pieces of data at the same time, the total elapsed time of the ZSS short signature scheme after the introduction of bilinear pairs and generalized cryptographic hash function is 14753.96ms, which reduces the elapsed time by 50.66% compared with the original scheme. The average verification time consumed in ten experiments with data sizes of 1MB, 50MB, 500MB, and 1000MB is 601.12s, 644.73s, 987.17s, and 1267.32s, respectively, and the time trend consumed by the TPSP to generate the hash value is basically the same as that of the verification time, which proves that the scheme in this paper is safe and efficient.
