ccrypt is an encryption and decryption toolkit, generally used on Linux, this is a Windows version of the tutorial
Note that ccrypt is a *command line* program. It can only be run from a DOS prompt or shell. It's not the kind of program you can double-click to run.
step1
Go to the official website to download the corresponding installation package
I am 64-bit windows, so I choose this download
Step2
Unzip the file, put the ccrypt.exe and cygwin1.dll in the folder into the C:/Windows folder
Step3
Copy four copies of ccrypt.exe under C:/Windows, and name them respectively
Step4
Then win + r to open cmd, cd to the folder of the encrypted file, and then use the ccdecrypt command, enter the password to get the file
ccdecrypt ATLAS_R2.0.tar.gz.cpt