大素数是 rsa 非对称加密, 公钥算法。 你用的是对称加密。 当然不排除nsa对此也做了手脚。不过 According to the Snowden documents, the NSA is doing research on whether a cryptographic attack based on tau statistic may help to break AES.[30] As for now, there are no known practical attacks that would allow anyone to read correctly implemented AES encrypted data.