This will be a dump of various bits and pieces of miscellaneous decking knowledge.

Alternative representation and additional information is also available at the [[houserules#decking|houserules]] article.

1. Canonically the Matrix requires a subscription to use. Because you're a fly-by-night shadowrunner who refuses to pay the corps their nuyen, not that you have a SIN to pay with, *any* intrusion into the Matrix is considered a hostile one. This means as soon as you step foot into it the tally (security/alert) level begins to climb.

2. Exits themselves (SANs) can be encrypted and there are several bugs on how it is documented.
  * locate host blah
  * -> Your search returns the address blah.
  * logon blah
  * -> You fail to gain access to the host.
  * # The target room has an AccessScramble value, which blocks remote login.  But it could be the source room blocking, so...
  * analyze access
  * -> There is nothing out of the ordinary about that subsystem.
  * # Well, now what?  (This is what usually keeps people from logon.  But the source room has no encryption.  So decker has bright idea:)
  * analyze blah
  * -> Analyze what?  (That doesn't work...)
  * help decrypt
  * -> helpfile shows no ability to decrypt exits/SANS exists
  * # But finally if you just do it anyway:
  * decrypt blah
  * -> You successfully decrypt that SAN.

So, the room is not the SAN, the exit is. An access-encrypted room can prevent movement in, forcing you to decrypt it blind.