为了保障数据的存储和传输安全，需要对一些重要数据进行加密。由于对称密码算法（作答此空），因此特别适合对大量的数据进行加密。国际数据加密算法IDEA的密钥长度是（）位。
- A.比非对称密码算法更安全
- B.比非对称密码算法密钥长度更长
- C.能同时用于身份认证
- D.比非对称密码算法效率更高
正确答案及解析
正确答案
解析
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