For digitally signing large files, the files are first compressed (the fixed-length hash is calculated) in a secure manner using these algorithms, and then signed with the private key.

要数字签署大型文件，首先使用这些算法用一种安全的方式压缩(计算固定长度的哈希码)文件，然后再用私钥签署。

youdao

For digitally signing large files, the files are first compressed (the fixed-length hash is calculated) in a secure manner using these algorithms, and then signed with the private key.

要数字签署大型文件，首先使用这些算法用一种安全的方式压缩(计算固定长度的哈希码)文件，然后再用私钥签署。

youdao