Is there a way to give different names to an OpenSSL encrypted tar file on Mac?

Open Terminal.app, then type:

tar -czvf - your_directory/ | openssl enc -aes-256-cbc -pbkdf2 -salt -out your_encrypted_file_name.enc

• tar -czvf - your_directory/: This creates a compressed tar archive (using gzip) and sends it to standard output (the pipe |). 
• openssl enc: This is the OpenSSL command for symmetric encryption. 
• -aes-256-cbc: Specifies the encryption algorithm (AES-256 in Cipher Block Chaining mode). 
• -pbkdf2: Uses a strong key derivation function to derive the key from your password. 
• -salt: Adds a random salt to the encryption process, which is good practice for security. 
• -out your_encrypted_file_name.enc: This is the crucial part that tells OpenSSL to name the encrypted output file your_encrypted_file_name.enc

Does:

https://htmlpreview.github.io/?https://github.com/FiloSottile/age/blob/main/doc/age.1.html

not work?

To encrypt:

age -p secrets.txt > secrets.txt.age
Enter passphrase (leave empty to autogenerate a secure one):

To decrypt:

$ age -d secrets.txt.age > secrets.txt

Scroll down to the command examples section:

https://docs.openssl.org/3.6/man1/openssl-enc/

tar is old school UNIX, and not as common for Mac-to-Mac. zip is more common, and does vastly better cross-platform. And on macOS, OpenSSL is a deprecated since OS X 10.7, unless the mainline version has been installed separately.

Usual for Mac to Mac is using Disk Utility (hdoutil, diskutil) and an encrypted disk image (virtual volume), HFS+ or APFS.

That’s hdiutil create and some mount and dismount commands, sometimes diskutil.

Something like this:

hdiutil create -size 1mb -fs apfs -volname SecretKey -encryption AES-128 MyEncryptedVolume.dmg -attach

Related:

https://apple.stackexchange.com/questions/326068/how-do-i-create-an-encrypted-apfs-volume-from-the-command-line

If you don’t want to use hdiutil and diskutil here for, for instance, cross-platform portability, I’d install and use Filippo Valsorda’s age utility (available via Homebrew), as that UI is much simpler than the deprecated-on-macOS OpenSSL utility. age is harder to screw up.

openssl enc -e [rest of command]
openssl enc -d [rest of command]

The -e encryption switch is the default, though I usually specify it. The -d decryption switch must be specified.

As for encryption modes, I wouldn’t usually select CBC. Probably GCM.

https://terrazone.io/aes-256-encryption-types/

Command details: https://docs.openssl.org/3.0/man1/openssl-enc/

Whatever instructions you’re following seem most of twenty years old too, between the use of tar and the selected OpenSSL mode. The command syntax is cryptic too, and it is easy to make (grievous) errors. Which is part of why I suggested using age.

kacsavirag wrote:

I encrypted a small .txt file with it ,on decrypting it I am asked for my passphrase ,then looking at finder I see still the .txt file encrypted .txt.age and also my original file .txt

I tried to encrypt some .jpg or .heic file ,was not possible . It is only made for .txt files ? But then this cannot encrypt a folder ?

“Not possible” is not an age error message I am familiar with. Slightly more seriously, if you want to discuss errors and issues this and similar contexts, you will want to show the command(s) used, and any error messages received. Some sort of a reproducer that is, allowing others to see what you did, and what happened.

From the examples section of the age tool, this showing encryption using an ssh key, an example encrypting and decrypting JPG files:

You may want to use the “armor” switch if you’re going to be mailing the encrypted files around.

kacsavirag wrote:

The letters are too small ,unreadable , please use code insertion

The screen shots are from the previously-linked man page for age, as was mentioned in that reply.

You can and should read the man page to learn about the tool, and for this example.

As for learning how to use the rendering features of your particular web browser, that depends on which browser.

You can find more information on the screen zoom feature in Safari here:

Zoom in on webpages in Safari on Mac - Apple Support

The following example of live text is from iPad, but recent macOS has similar features:

Selecting Show Text in the pop-up gets the text, and a Copy All feature, as shown below.

Again, this is from iPad, but recent macOS has similar features.

For more info: Use Live Text to interact with text in a photo on Mac - Apple Support