Password

Passwords protect a variety of different things in Homestuck: computers, timeline segments, and points of re-entry to the "continuity" for the purposes of improving the alpha timeline with John's retcon-inspired time travel juju power John The Captcha and genetic/first guardian(MEOW, HONK) codes are not to be considered passwords for the purposes of this article.

Bro
According to AH's forumspring, the password to Bro's computer is: HS 2356 (lilcal)

Jade
Jade decides to keep her conversations with trolls as linear as possible, so she gives them a password whenever a Pesterchum/Trollian session ends, which the troll can then pick up again in both the troll's and Jade's subjective futures.

The first password Jade gives Kanaya: HS 5220 (CROOOOOOOOOOOAK)

Two passwords Jade gives to Karkat: one reused by Karkat for to secure a separate section of the memory bubble of Openbound was: HS 5872 (IF I HATE MYSELF SO MUCH,)THEN WHY HS 7163 (DON'T I HATEMARRY MYSELF?) and the final password is HS 6001 (SEE YOU SOON).

Karkat
See above

Mom
413 to Jasper's mausoleum.

John/Terezi
home

just1c3

murd3r

Mom3nt

R3UN1ON

fl1p

fr4m3d