1.Create SDDT.bin with 16 bytes of 0 written in the iv key 2.Decrypt only the first 16 bytes once with fsdecrypt or fstool 3.The first 16 bytes of the decrypted file is the iv key 1.创建SDDT.bin,在iv键中写入16个字节的0 2.用fsdecrypt或fstool只对前16个字节进行一次解密 3.解密后的文件的前16个字节是iv密钥