commit 21e79aec731e068c0ba92c50f5fa5d3f5132b003 Author: Isis Lovecruft isis@torproject.org Date: Wed Dec 13 23:51:21 2017 +0000
prop#249: Add recommendation on equal number of cells in each direction. --- proposals/249-large-create-cells.txt | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/proposals/249-large-create-cells.txt b/proposals/249-large-create-cells.txt index b1967f3..c08b596 100644 --- a/proposals/249-large-create-cells.txt +++ b/proposals/249-large-create-cells.txt @@ -77,6 +77,14 @@ Status: Open If any intervening cells are received, the receiver SHOULD destroy the circuit.
+ Protocols which make use of CREATE(D)2V cells SHOULD send an equal number + of cells in either direction, to avoid trivially disclosing information + about the direction of the circuit: for example a relay might use the + fact that it saw five EXTEND2 cells in one direction and three in the + other to easily determine whether it is the middle relay on the onion + service-side or the middle relay on the client-side of a rendezvous + circuit. + 4. Interacting with RELAY_EARLY cells
The first EXTEND2 cell in a batch must arrive in a RELAY_EARLY cell.