How to encrypt txt files with AES256 via Windows 7z command line?

Question

I have 7z on windows , and I want to encrypt 1 txt file with AES256 via 7z command line.

How can I do it please?

Answer 1

To make the answer simple just use the switch -p which means Set Password with the default encryption which is AES.

The example below will encrypt the file or folder and prompt for a password:

• 7z a -p Zip_File_Name File_2_zip.txt

The following example will auto add the password to the file for you.

• 7z a -pPassword Zip_File_Name.7z File_2_Zip.txt

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The other switches used above are:

7z a -p -mhe=on Zip_File_Name.7z File_2_Zip.txt
-pPassword   ==  Auto add password without being prompted
 -mhe=on      ==  Means to encrypt the file names in archive too.

Answer 2

7za u -mx -mhe -pPASSWORD ARCHIVE-FILE-NAME.7Z SOURCE-FILE-SPEC

Any time you use the .7z format, the file is AES-256 encrypted.

Arguments explained:

-pPASSWORD: setting the password PASSWORD.
u: update existing archive with new or modified files.
-mx: default compression level (5/6) - -mx1 (fastest) to -mx9.
-mhe: encryption of file headers (encrypted file names).