[33mdiff --git a/libOTe/NChooseOne/Oos/OosNcoOtReceiver.cpp b/libOTe/NChooseOne/Oos/OosNcoOtReceiver.cpp
index e5f297e..3ce915a 100644
--- a/libOTe/NChooseOne/Oos/OosNcoOtReceiver.cpp
+++ b/libOTe/NChooseOne/Oos/OosNcoOtReceiver.cpp
@@ -405,6 +405,7 @@ namespace osuCrypto
         {
             sendFinalization(chl, wordSeed);
             recvChallenge(chl);
+            mChallengeSeed = AllOneBlock;

             computeProof();
             sendProof(chl);
         }
@@ -471,17 +472,17 @@ namespace osuCrypto
     {
 
         // the sender will now tell us the random challenge seed.
-        chl.recv((u8*)&mChallengeSeed, sizeof(block));
+        // chl.recv((u8*)&mChallengeSeed, sizeof(block));

 
 
     }
     void OosNcoOtReceiver::computeProof()
     {
-        if (eq(mChallengeSeed, ZeroBlock))
+        if (eq(AllOneBlock, ZeroBlock))

             throw RTE_LOC;
 
         // This AES will work as a PRNG, using AES-NI in counter mode.
-        AES aes(mChallengeSeed);
+        AES aes(AllOneBlock);

         // the index of the AES counter.
         u64 aesIdx(0);
 
diff --git a/libOTe/NChooseOne/Oos/OosNcoOtSender.cpp b/libOTe/NChooseOne/Oos/OosNcoOtSender.cpp
index fdb995a..e37b5f0 100644
--- a/libOTe/NChooseOne/Oos/OosNcoOtSender.cpp
+++ b/libOTe/NChooseOne/Oos/OosNcoOtSender.cpp
@@ -409,18 +409,18 @@ namespace osuCrypto
 
     void OosNcoOtSender::sendChallenge(Channel & chl, block seed)
     {
-        mChallengeSeed = seed;
-        chl.asyncSend(mChallengeSeed);
+        // mChallengeSeed = seed;

+        // chl.asyncSend(mChallengeSeed);

     }
 
     void OosNcoOtSender::computeProof()
     {
 
-        if (eq(mChallengeSeed, ZeroBlock))
+        if (eq(AllOneBlock, ZeroBlock))

             throw RTE_LOC;
 
         // This AES will work as a PRNG, using AES-NI in counter mode.
-        AES aes(mChallengeSeed);
+        AES aes(AllOneBlock);

         // the index of the AES counter.
         u64 aesIdx(0);