diff --git a/libraries/app/api.cpp b/libraries/app/api.cpp
index 4d4f4dec..a6db2008 100644
--- a/libraries/app/api.cpp
+++ b/libraries/app/api.cpp
@@ -681,20 +681,6 @@ namespace graphene { namespace app {
 
     crypto_api::crypto_api(){};
 
-    blind_signature crypto_api::blind_sign( const extended_private_key_type& key, const blinded_hash& hash, int i )
-    {
-       return fc::ecc::extended_private_key( key ).blind_sign( hash, i );
-    }
-
-    signature_type crypto_api::unblind_signature( const extended_private_key_type& key,
-                                                     const extended_public_key_type& bob,
-                                                     const blind_signature& sig,
-                                                     const fc::sha256& hash,
-                                                     int i )
-    {
-       return fc::ecc::extended_private_key( key ).unblind_signature( extended_public_key( bob ), sig, hash, i );
-    }
-
     commitment_type crypto_api::blind( const blind_factor_type& blind, uint64_t value )
     {
        return fc::ecc::blind( blind, value );
diff --git a/libraries/app/include/graphene/app/api.hpp b/libraries/app/include/graphene/app/api.hpp
index 44ce7b68..9cd048db 100644
--- a/libraries/app/include/graphene/app/api.hpp
+++ b/libraries/app/include/graphene/app/api.hpp
@@ -294,14 +294,6 @@ namespace graphene { namespace app {
       public:
          crypto_api();
          
-         fc::ecc::blind_signature blind_sign( const extended_private_key_type& key, const fc::ecc::blinded_hash& hash, int i );
-         
-         signature_type unblind_signature( const extended_private_key_type& key,
-                                              const extended_public_key_type& bob,
-                                              const fc::ecc::blind_signature& sig,
-                                              const fc::sha256& hash,
-                                              int i );
-                                                                  
          fc::ecc::commitment_type blind( const fc::ecc::blind_factor_type& blind, uint64_t value );
          
          fc::ecc::blind_factor_type blind_sum( const std::vector<blind_factor_type>& blinds_in, uint32_t non_neg );
@@ -447,8 +439,6 @@ FC_API(graphene::app::network_node_api,
        (unsubscribe_from_pending_transactions)
      )
 FC_API(graphene::app::crypto_api,
-       (blind_sign)
-       (unblind_signature)
        (blind)
        (blind_sum)
        (verify_sum)