I saw that tweet. It didn’t make sense until your mention of deadman switch.
OTOH there was speculation that the original DNC release was sent to Wikileaks as a deadman switch from the material Rich (the DNC IT that died). Set up.
Maybe the reference to deadman switch was just a hint about that and not coming from Snowdon
DWS keeps insisting Russia. What can she say : It was sent from one of our own, but he’s been murdered ?
It could just be an encryption key for select people to contact him...he and assange are kind of at war over leaks . He thinks assange should redact info
There was a tweet from snowden saying...its time.
Assage said he,Snowden,and others have a 2 process coded key deadman switchs