https://quicktasks.ismael.casimpan.com/tags/encryption/Recent content in encryption on IT QuicktasksHugo -- gohugo.ioCopyright © 2018–2022, Ismael Casimpan Jr.; All Rights ReservedFri, 28 Aug 2020 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/zip-text-file-256aes/Fri, 28 Aug 2020 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/zip-text-file-256aes/ Use the following command: 17z a -p -mem=AES256 -tzip file.zip source-file1.txt source-file2.txt It will ask for a password but will obviously not be echoed. To decrypt: 17za e file.zip You need to install as well associated tools. Shown are for Redhat-like Linux: 1sudo yum install p7zip p7zip-plugins Some details https://unix.stackexchange.com/questions/182573/how-strong-is-the-encryption-of-a-zip-file-in-linux-mint and https://www.2daygeek.com/zip-7zip-encrypt-decrypt-password-protect-files-folders-linux/https://quicktasks.ismael.casimpan.com/post/mail-encryption/Sat, 28 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/mail-encryption/ in /etc/postfix/main.cf, add: 1smtpd_tls_security_level = may 2smtp_tls_security_level = may 3smtp_tls_loglevel = 1 4smtpd_tls_loglevel = 1 Details from From http://blog.snapdragon.cc/2013/07/07/setting-postfix-to-encrypt-all-traffic-when-talking-to-other-mailservers/