diff --git a/crypto.h b/crypto.h
index 5472532..d00a138 100644
--- a/crypto.h
+++ b/crypto.h
@@ -116,5 +116,15 @@ int smc_zkp_0og_check (const gcry_mpi_point_t y,
 /* --- Protocol implementation --- */
 
 unsigned char *smc_gen_keyshare (struct AuctionData *ad, size_t *buflen);
+int smc_recv_keyshare (struct AuctionData *ad,
+                       unsigned char      *buf,
+                       size_t             buflen,
+                       uint16_t           sender_index);
+
+unsigned char *smc_encrypt_bid (struct AuctionData *ad, size_t *buflen);
+int smc_recv_encrypted_bid (struct AuctionData *ad,
+                            unsigned char      *buf,
+                            size_t             buflen,
+                            uint16_t           sender_index);
 
 #endif /* ifndef _BRANDT_CRYPTO_H */