How to encrypt and decrypt a password in UNIX shell script?

Unix Shell Script

[srv049 ~]$ cd /informatica

[srv049 informatica]$ echo  'YourPassw0rd@123#' | base64 > passcodefile.crdn

[srv049 informatica]$ echo $(echo Your encryted passwrod is : ) $(head -1 passcodefile.crdn)

Your encryted passwrod is : WW91clBhc3N3MHJkQDEyMyMK

[srv049 informatica]$ cd /informatica

[srv049 informatica]$ PASSWORD_VARIABLE=$(echo $(head -1 passcodefile.crdn) | base64 --decode)

[srv049 informatica]$ echo '                         'Original password : $PASSWORD_VARIABLE

                         Original password : YourPassw0rd@123#

[srv049 informatica]$