{"id":4424,"date":"2012-03-15T15:57:38","date_gmt":"2012-03-15T19:57:38","guid":{"rendered":"http:\/\/g33kinfo.com\/info\/?p=4424"},"modified":"2012-03-15T15:57:38","modified_gmt":"2012-03-15T19:57:38","slug":"file-password-protection","status":"publish","type":"post","link":"https:\/\/g33kinfo.com\/info\/file-password-protection\/","title":{"rendered":"File Password Protection"},"content":{"rendered":"

How do I password protect \/ encrypt a file within Linux using OpenSSL ?<\/strong><\/p>\n

The file we will encrypt will be the file secretfile.txt.As you can see it is just a plain text file.<\/p>\n

Encrypt File<\/strong><\/p>\n

Use the openssl comand to encrypt your file and then test the new file is fully encrypted.<\/p>\n

$ openssl aes-256-cbc -salt -in secretfile.txt -out secretfile.txt.aes
\nenter aes-256-cbc encryption password:
\nVerifying \u2013 enter aes-256-cbc encryption password:<\/p>\n

$ cat secretfile.txt.aes
\nbinary data<\/code><\/p>\n

Decrypt File<\/strong><\/p>\n

Decrypt the file and then confirm the decypted file is readable.<\/p>\n

$ openssl aes-256-cbc -d -salt -in secretfile.txt.aes -out secretfile.txt
\nenter aes-256-cbc decryption password:<\/p>\n

$ cat secretfile.txt
\nThis is a secret file that we do not want anyone to read.<\/code><\/p>\n

======================================<\/p>\n

How do I password protect \/ encrypt a file within Linux using Mcrypt?<\/strong>
\nEncrypt File<\/strong><\/p>\n

Use the mcrypt comand to encrypt your file and then test the new file is fully encrypted.<\/p>\n

$ mcrypt secretfile.txt<\/p>\n

Output:
\nEnter the passphrase (maximum of 512 characters)
\nPlease use a combination of upper and lower case letters and numbers.
\nEnter passphrase:
\nEnter passphrase:<\/code><\/p>\n

A new file is created with the extension .nc<\/p>\n

$ ls secretfile.txt.nc<\/code><\/p>\n

Decrypt File<\/strong><\/p>\n

Decrypt the file and then confirm the decypted file is readable.<\/p>\n

$ mcrypt -d secretfile.txt.nc<\/p>\n

Output:<\/p>\n

Enter passphrase:
\nFile secretfile.txt.nc was decrypted.<\/code><\/p>\n

======================================<\/p>\n

How do I password protect \/ encrypt a file within Linux using GPG?<\/strong>
\nEncrypt File<\/strong><\/p>\n

Use the gpg comand to encrypt your file and then test the new file is fully encrypted.<\/p>\n

$ gpg -c secretfile.txt<\/p>\n

Output:
\nEnter passphrase:
\nRepeat passphrase:
\n<\/code>
\nThis will create a secretfile.txt.gpg file.<\/p>\n

Decrypt File<\/strong><\/p>\n

Decrypt the file and then confirm the decypted file is readable.<\/p>\n

$ gpg secretfile.txt.gpg<\/code><\/p>\n

Decrypt file and write output to file<\/p>\n

$ gpg secretfile.txt.gpg -o somefile.txt<\/code><\/p>\n

======================================<\/p>\n

In all of the examples above we need to remove the original document once the new file is created.<\/p>\n

======================================<\/p>\n

Easiest method is to create a file using vim with the -x flag<\/p>\n

vim -x<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"

How do I password protect \/ encrypt a file within Linux using OpenSSL ? The file we will encrypt will be the file secretfile.txt.As you can see it is just a plain text file. Encrypt File Use the openssl comand to encrypt your file and then test the new file is fully encrypted. $ openssl… <\/p>\n

Read More<\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-4424","post","type-post","status-publish","format-standard","hentry","category-cli"],"yoast_head":"\nFile Password Protection - Linux Shtuff<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/g33kinfo.com\/info\/file-password-protection\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"File Password Protection - Linux Shtuff\" \/>\n<meta property=\"og:description\" content=\"How do I password protect \/ encrypt a file within Linux using OpenSSL ? The file we will encrypt will be the file secretfile.txt.As you can see it is just a plain text file. Encrypt File Use the openssl comand to encrypt your file and then test the new file is fully encrypted. $ openssl... 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