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Download 'openssl' and learn to use it.

Contents of message.txt:
This is a very secret message.

[encrypt the message]
openssl enc -a  -aes-256-cbc -in message.txt -out encryptedMessage.txt


[decrypt the message]
openssl enc -a -d -aes-256-cbc -in encryptedMessage.txt -out message.txt

  • Use long complicated passwords
  • Never store your password on your computer
  • if you are extra paranoid copy the message to a memory stick and encrypt/decrypt on another computer not on the internet, ever.

OR....Use gnupg (gpg)

This is a very secret message

[encrypt the message]
# gpg -c message.txt

Œ Œ ®HNŽ®ì`ÒX1ðJ¸˜ÌQKHÅ;›‚üX‰V~’;ÖHT†ª4 :á7WSÚÌçð`‘á
ÉÄÕd¢“6ÄQ0:    5EGuç_Fzwšãuž³½ó^¼!{=M,#šÀ

[decrypt message.txt.gpg]
# gpg -o message.txt -d message.txt.gpg

The decrypted message will appear in the stdout unless you use the -o (output) option, as above.

Author: admin -  Date: 08 Jan 2021 02:38
Category: security -  Visits: 452

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