How do I configure wpa_supplicant.conf?

[xpto09]

The  command iwlist scanning shows:

wlan0     Scan completed :

          Cell 01 - Address: 00:1B:11:E5:08:5B
                    ESSID:"home"
                    Mode:Master
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=73/100  Signal level:-60 dBm  Noise level=-69
dBm
                    Encryption key:on
                    IE: Unknown: 000472706972
                    IE: Unknown: 010882848B960C183048
                    IE: Unknown: 030101
                    IE: Unknown: 2A0100
                    IE: Unknown: 32041224606C
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                       Preauthentication Supported
                    IE: Unknown: DD0900037F01010006FF7F
                    IE: Unknown: DD0C00037F020101000002A34000
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:tsf=0000000251ce1181
                    Extra: Last beacon: 553ms ago

What do I have to put in "?" ?

wpa_supplicant.conf:

ctrl_interface=/var/run/wpa_supplicant

network={
ssid=home
proto="?"
key_mgmt="?"
pairwise="?"
group="?"
psk=999999999999999999999999999999999999999
}
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