They are referring to the SAS verification, which are two words derived from the peer to peer key exchange process. If they match on both ends, you can have a v

They are referring to the SAS verification, which are two words derived from the peer to peer key exchange process. If they match on both ends, you can have a very high degree of confidence that there is no man in the middle. It's not a password, it's a verification tool that can be used to double check the security of your connection once you are sure you are talking to the right person.