Cifrar un fichero

openssl des3 -salt -in fichero_a_cifrar.txt -out fichero_cifrado.txt

openssl des3 -salt -in fichero_a_cifrar.txt -out fichero_cifrado.txt

gpg -c file 	
usage: gpg [options] --symmetric [filename]

gpg -c file usage: gpg [options] --symmetric [filename]

openssl des3 -d -salt -in fichero_cifrado.txt -out fichero_a_descifrar.txt

openssl des3 -d -salt -in fichero_cifrado.txt -out fichero_a_descifrar.txt

  	gpg file.gpg

gpg file.gpg

$ touch a
$ gpg -c a
Enter passphrase:elpasswordessecreto
$ gpg: WARNING: `a' is an empty file
$ ls -l 
-rw-r--r-- 1 root root        0 2010-12-04 00:00 a
-rw-r--r-- 1 root root       40 2010-12-04 00:00 a.gpg

$ touch a $ gpg -c a Enter passphrase:elpasswordessecreto $ gpg: WARNING: `a' is an empty file $ ls -l -rw-r--r-- 1 root root 0 2010-12-04 00:00 a -rw-r--r-- 1 root root 40 2010-12-04 00:00 a.gpg

$ gpg a.gpg
gpg: CAST5 encrypted data
gpg: encrypted with 1 passphrase
File `a' exists. Overwrite? (y/N) y
gpg: WARNING: message was not integrity protected

$ gpg a.gpg gpg: CAST5 encrypted data gpg: encrypted with 1 passphrase File `a' exists. Overwrite? (y/N) y gpg: WARNING: message was not integrity protected