diff --git a/pkg/arvo/app/chat-cli.hoon b/pkg/arvo/app/chat-cli.hoon
index 5a45ed9cff..4090fd7006 100644
--- a/pkg/arvo/app/chat-cli.hoon
+++ b/pkg/arvo/app/chat-cli.hoon
@@ -41,7 +41,7 @@
     ::
       ::
       ::  create chat
-      [%create chat-security path (unit glyph) (unit ?)]
+      [%create rw-security path (unit glyph) (unit ?)]
       [%delete path]                                ::  delete chat
       [%invite ?(%r %w %rw) path (set ship)]        ::  allow
       [%banish ?(%r %w %rw) path (set ship)]        ::  disallow
@@ -611,7 +611,7 @@
     ::  +create: new local mailbox
     ::
     ++  create
-      |=  [security=chat-security =path gyf=(unit char) allow-history=(unit ?)]
+      |=  [security=rw-security =path gyf=(unit char) allow-history=(unit ?)]
       ^-  (quip move _this)
       ::TODO  check if already exists
       =/  =target  [our-self path]
diff --git a/pkg/arvo/app/chat-hook.hoon b/pkg/arvo/app/chat-hook.hoon
index 14e0776f07..c67a38316b 100644
--- a/pkg/arvo/app/chat-hook.hoon
+++ b/pkg/arvo/app/chat-hook.hoon
@@ -419,7 +419,7 @@
   [ost.bol %poke / [our.bol %invite-store] [%invite-action act]]
 ::
 ++  create-permission
-  |=  [pax=path sec=chat-security]
+  |=  [pax=path sec=rw-security]
   ^-  (list move)
   =/  read-perm   (weld pax /read)
   =/  write-perm  (weld pax /write)
diff --git a/pkg/arvo/app/chat-view.hoon b/pkg/arvo/app/chat-view.hoon
index 45c1b75dc4..ffc78d1301 100644
--- a/pkg/arvo/app/chat-view.hoon
+++ b/pkg/arvo/app/chat-view.hoon
@@ -279,7 +279,7 @@
   .^(chat-configs %gx /=chat-store/(scot %da now.bol)/configs/noun)
 ::
 ++  create-security
-  |=  [pax=path sec=chat-security]
+  |=  [pax=path sec=rw-security]
   ^-  (list move)
   =/  read   (weld pax /read)
   =/  write  (weld pax /write)
diff --git a/pkg/arvo/lib/chat-json.hoon b/pkg/arvo/lib/chat-json.hoon
index 84a3e8f9a0..10ed87411c 100644
--- a/pkg/arvo/lib/chat-json.hoon
+++ b/pkg/arvo/lib/chat-json.hoon
@@ -256,7 +256,7 @@
   ::
   ++  sec
     =,  dejs:format
-    ^-  $-(json chat-security)
+    ^-  $-(json rw-security)
     (su (perk %channel %village %journal %mailbox ~))
   --
 --
diff --git a/pkg/arvo/mar/chat/hook-action.hoon b/pkg/arvo/mar/chat/hook-action.hoon
index 9d3adf8a8e..6ae4d43747 100644
--- a/pkg/arvo/mar/chat/hook-action.hoon
+++ b/pkg/arvo/mar/chat/hook-action.hoon
@@ -31,7 +31,7 @@
       ==
     ::
     ++  sec
-      ^-  $-(^json chat-security)
+      ^-  $-(^json rw-security)
       (su (perk %channel %village %journal %mailbox ~))
     ::
     --
diff --git a/pkg/arvo/sur/chat-hook.hoon b/pkg/arvo/sur/chat-hook.hoon
index bc44c3b129..d1c264f5aa 100644
--- a/pkg/arvo/sur/chat-hook.hoon
+++ b/pkg/arvo/sur/chat-hook.hoon
@@ -1,16 +1,10 @@
+/-  *rw-security
 |%
-+$  chat-security
-  $?  $channel                                          ::  black r, black w
-      $village                                          ::  white r, white w
-      $journal                                          ::  black r, white w
-      $mailbox                                          ::  white r, black w
-  ==
-::
 +$  chat-hook-action
   $%  ::  %add-owned: make a chatroom accessible to foreign ships
-      ::  specified by the chat-security model
+      ::  specified by the rw-security model
       ::
-      [%add-owned =path security=chat-security allow-history=?]
+      [%add-owned =path security=rw-security allow-history=?]
       ::  %add-synced: mirror a foreign chatroom to our chat-store
       ::
       [%add-synced =ship =path ask-history=?]
diff --git a/pkg/arvo/sur/chat-view.hoon b/pkg/arvo/sur/chat-view.hoon
index 17cd6eb8ec..aca2bbee4d 100644
--- a/pkg/arvo/sur/chat-view.hoon
+++ b/pkg/arvo/sur/chat-view.hoon
@@ -1,15 +1,9 @@
+/-  *rw-security
 |%
-+$  chat-security
-  $?  $channel                                          ::  black r, black w
-      $village                                          ::  white r, white w
-      $journal                                          ::  black r, white w
-      $mailbox                                          ::  white r, black w
-  ==
-::
 +$  chat-view-action
   $%  $:  %create
           =path
-          security=chat-security
+          security=rw-security
           read=(set ship)
           write=(set ship)
           allow-history=?
diff --git a/pkg/arvo/sur/rw-security.hoon b/pkg/arvo/sur/rw-security.hoon
new file mode 100644
index 0000000000..477370c001
--- /dev/null
+++ b/pkg/arvo/sur/rw-security.hoon
@@ -0,0 +1,8 @@
+|%
++$  rw-security
+  $?  $channel                                          ::  black r, black w
+      $village                                          ::  white r, white w
+      $journal                                          ::  black r, white w
+      $mailbox                                          ::  white r, black w
+  ==
+--