Educause Security Discussion mailing list archives

Re: password length and required reset


From: "Flynn, Gary - flynngn" <flynngn () JMU EDU>
Date: Mon, 10 Oct 2016 13:18:51 +0000

Compromise of the accounts you mention primarily affect the data and services 
of the owner of the account. That is, they're self-service accounts.

Compromise of a faculty or staff account would almost certainly provide 
unauthorized access to constituent data, institutional data, and/or the 
ability to affect constituent services.

I would guess that the authentication policies for the employees of the 
organizations you listed are different than the policies that apply to their 
customers. At least I'd hope so. :)

Gary Flynn
Security Engineer
James Madison University

-----Original Message-----
From: The EDUCAUSE Security Constituent Group Listserv
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Mike
Cunningham
Sent: Monday, October 10, 2016 9:10 AM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: [SECURITY] password length and required reset

Thanks for the feedback.

How do you counter the argument that no other online service that requires
passwords have any set time limit on a password, and they are sites with
much more sensitive information. Bank sites, credit card sites, amazon,
paypal, gmail, yahoo, Hotmail, outlook.com phone companies, Netflix, etc. I
can't think of any service that I have myself that requires me to change a
password on a regular basis and that is how students view us, as just 
another
online service.  I am 100% in favor of employees needing to reset a password
since their access gives them access to other peoples data but for students
they only have access to their own data so password mismanagement only
puts their own data at risk, just like on any of those other services.

Mike Cunningham

-----Original Message-----
From: The EDUCAUSE Security Constituent Group Listserv
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Boyd, Daniel
Sent: Monday, October 10, 2016 8:42 AM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: [SECURITY] password length and required reset

You are correct in thinking that 12 characters will help.  If you run 
passwords
through most any analyzer, that 12th character adds a tremendous amount
of time to the decryption process... but will not help if common phrases,
titles, and sequences are used.

We recently moved all faculty, staff and service accounts to a 90-day
password reset cycle, with a history of 6.  We are considering a minimum
password age of 2 days, but have not implemented that change yet.  We
recommend the password to be a minimum of 8, but no longer than 13
characters (any longer and Office365 complains, at least as of August of 
this
year) and cannot contain three consecutive characters of their username.  It
also must have a capital letter and a number or symbol.

It has taken a number of years to push this policy amid lots of grumbling 
from
staff and faculty.  We got buy-in from administration by explaining our
reasons for implementing, we communicated the change effectively to the
community and so far, have not had significant backlash.  We considered
having two different policies for staff and faculty, but decided it was in
everyone's best interest to enforce the stricter policy (whether they
believed it or not).

Students have all the same requirements except the max age for their
password is 180 days.  No issues there either, as this is explained at
orientation.  While it frustrates a tiny percentage, it is an acceptably low
percentage.

The key is effective communication and simple explanation of the reasons
why this is important.

Good luck with any changes you make.

Dan


Daniel H. Boyd (94C)
Senior Network Architect
Network Operations
Information Security Advisory Group Chair Berry College
Phone: 706-236-1750
Fax:     706-238-5824

There are two rules to follow with your account passwords:
1. NEVER SEND YOUR PASSWORD VIA EMAIL (TO ANYONE)!!!!!
2. If unsure, consult rule #1




-----Original Message-----
From: Mike Cunningham [mailto:mike.cunningham () PCT EDU]
Sent: Friday, October 07, 2016 3:29 PM
Subject: password length and required reset

We current have a password length rule of 6 with a password expiration of
180 days. We are considering changing that to a length of 12 with a
recommendation to use a pass phrase, and no expiration. Students can want
to can change their password daily or never. We believe the longer length
requirement will make the password so much stronger that the password
reset is no longer needed. This change is for students ONLY. Employees will
still have a password recent requirement.

Thanks


Mike Cunningham
VP of Information Technology Services/CIO Pennsylvania College of
Technology


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