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UNIX for Advanced & Expert Users
When did UNIX start using encrypted passwords, and not displaying passwords when you type them in?
Post 302606051 by drl on Friday 9th of March 2012 11:55:17 AM
03-09-2012
Hi.
Note also that the original terminal for UNIX (TM) was in fact a teletype -- a TTY. That, and many hardcopy devices, would always show the text as it was typed in, so the 8 character-space for the password was obscured beforehand with a series of over-strikes, so that it was very difficult to see what had been typed by the human. Still the NSA could ... but that's a different story, eh?
... cheers, drl
Note also that the original terminal for UNIX (TM) was in fact a teletype -- a TTY. That, and many hardcopy devices, would always show the text as it was typed in, so the 8 character-space for the password was obscured beforehand with a series of over-strikes, so that it was very difficult to see what had been typed by the human. Still the NSA could ... but that's a different story, eh?
... cheers, drlThis User Gave Thanks to drl For This Post:
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LEARN ABOUT DEBIAN
systemd-tty-ask-password-agent
SYSTEMD-TTY-ASK-PASSWORD-AGENT(1) systemd-tty-ask-password-agent SYSTEMD-TTY-ASK-PASSWORD-AGENT(1) NAME
systemd-tty-ask-password-agent - List or process pending systemd password requests SYNOPSIS
systemd-tty-ask-password-agent [OPTIONS...] [VARIABLE=VALUE...] DESCRIPTION
systemd-tty-ask-password-agent is a password agent that handles password requests of the system, for example for hard disk encryption passwords or SSL certificate passwords that need to be queried at boot-time or during runtime. systemd-tty-ask-password-agent implements the Password Agents Specification[1], and is one of many possible response agents which answer to queries formulated with systemd-ask-password(1). OPTIONS
The following options are understood: --list Lists all currently pending system password requests. --query Process all currently pending system password requests by querying the user on the calling TTY. --watch Continuously process password requests. --wall Forward password requests to wall(1) instead of querying the user on the calling TTY. --plymouth Ask question with plymouth(8) instead of querying the user on the calling TTY. --console Ask question on /dev/console instead of querying the user on the calling TTY. -h, --help Print a short help text and exit. --version Print a short version string and exit. EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise. SEE ALSO
systemd(1), systemctl(1), systemd-ask-password-console.service(8), wall(1), plymouth(8) NOTES
1. Password Agents Specification https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents systemd 237 SYSTEMD-TTY-ASK-PASSWORD-AGENT(1)