mjhjmtu

I am currently attempting to install Debian on my laptop computer. During the network configuration stage, I am prompted to "enter a passphrase for WPA/WPA2 PSK authentication". Unfortunately, I am on my school's network which requires both a username and a password, with the MS-CHAPv2 authentication protocol. What should I enter at the prompt?

I have an Ubuntu computer which can connect to this network. Here are the contents of /etc/NetworkManager/system-connections/NetworkName:

[ipv6]
method=auto

[connection]
id=NetworkName
uuid=3e728a68-a877-4681-bc0e-1e64b2ff6434
type=802-11-wireless

[802-11-wireless-security]
key-mgmt=wpa-eap
auth-alg=open

[802-11-wireless]
ssid=NetworkName
mode=infrastructure
mac-address=84:A6:C8:A9:67:DA
security=802-11-wireless-security

[802-1x]
eap=ttls;
identity=username
phase2-auth=mschapv2
password-flags=1

[ipv4]
method=auto

Curiously enough, the password I enter to connect to NetworkName doesn't appear anywhere.

EDIT 2: Screenshot of network connection process (in a live-boot Ubuntu)

I doubt the live-cd has the full fledged wpa-supplicant package on board. I would suggest putting the bigger cd/usb image so you can install without network. After that you can configure wpa_supplicant with the following config:

network=
 ssid="eduroam"
 proto=RSN
 key_mgmt=WPA-EAP
 eap=TTLS
 identity="yourusername@institute.com"
 password="yourpassword"
 phase2="auth=MSCHAPV2"

instead of your password in plaintext you can change the entry with:
password=hash:yourhash where yourhash was obtained by running your password through:

echo -n "yourpassword" | iconv -t utf16le | openssl md4

Different institutes have different settings but this usually works.