diff --git a/Makefile b/Makefile
index 872bc15..d2c0b32 100644
--- a/Makefile
+++ b/Makefile
@@ -140,6 +140,7 @@ endif
 # EIP-712
 ifneq ($(TARGET_NAME),TARGET_NANOS)
 DEFINES	+= HAVE_EIP712_FULL_SUPPORT
+#DEFINES += HAVE_EIP712_HALF_BLIND # temporary
 endif
 
 # Enabling debug PRINTF
diff --git a/src_features/signMessageEIP712/entrypoint.c b/src_features/signMessageEIP712/entrypoint.c
index e744ff1..cb4eb34 100644
--- a/src_features/signMessageEIP712/entrypoint.c
+++ b/src_features/signMessageEIP712/entrypoint.c
@@ -448,6 +448,9 @@ bool    handle_eip712_sign(const uint8_t *const apdu_buf)
     {
         return false;
     }
+#ifdef HAVE_EIP712_HALF_BLIND
+    ui_712_message_hash();
+#endif // HAVE_EIP712_HALF_BLIND
     ui_712_end_sign();
     return true;
 }
diff --git a/src_features/signMessageEIP712/field_hash.c b/src_features/signMessageEIP712/field_hash.c
index ef019ac..6dde239 100644
--- a/src_features/signMessageEIP712/field_hash.c
+++ b/src_features/signMessageEIP712/field_hash.c
@@ -66,7 +66,14 @@ bool    field_hash(const uint8_t *data,
         if (IS_DYN(field_type))
         {
             cx_keccak_init(&global_sha3, 256); // init hash
+#ifdef HAVE_EIP712_HALF_BLIND
+            if (path_get_root_type() == ROOT_DOMAIN)
+            {
+#endif // HAVE_EIP712_HALF_BLIND
             ui_712_new_field(field_ptr, data, data_length);
+#ifdef HAVE_EIP712_HALF_BLIND
+            }
+#endif // HAVE_EIP712_HALF_BLIND
         }
     }
     fh->remaining_size -= data_length;
@@ -123,7 +130,14 @@ bool    field_hash(const uint8_t *data,
             {
                 return false;
             }
+#ifdef HAVE_EIP712_HALF_BLIND
+            if (path_get_root_type() == ROOT_DOMAIN)
+            {
+#endif // HAVE_EIP712_HALF_BLIND
             ui_712_new_field(field_ptr, data, data_length);
+#ifdef HAVE_EIP712_HALF_BLIND
+            }
+#endif // HAVE_EIP712_HALF_BLIND
         }
         else
         {
@@ -159,6 +173,15 @@ bool    field_hash(const uint8_t *data,
 
         path_advance();
         fh->state = FHS_IDLE;
+#ifdef HAVE_EIP712_HALF_BLIND
+        if (path_get_root_type() == ROOT_MESSAGE)
+        {
+            G_io_apdu_buffer[0] = 0x90;
+            G_io_apdu_buffer[1] = 0x00;
+            io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 2);
+        }
+#endif // HAVE_EIP712_HALF_BLIND
+
     }
     else
     {
diff --git a/src_features/signMessageEIP712/path.c b/src_features/signMessageEIP712/path.c
index 1b199a2..7638d31 100644
--- a/src_features/signMessageEIP712/path.c
+++ b/src_features/signMessageEIP712/path.c
@@ -382,7 +382,21 @@ bool    path_set_root(const char *const struct_name, uint8_t name_length)
 
     // because the first field could be a struct type
     path_update();
+#ifdef HAVE_EIP712_HALF_BLIND
+    // Only show field for the domain
+    if (path_get_root_type() == ROOT_MESSAGE)
+    {
+        G_io_apdu_buffer[0] = 0x90;
+        G_io_apdu_buffer[1] = 0x00;
+        io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 2);
+    }
+    else
+    {
+#endif // HAVE_EIP712_HALF_BLIND
     ui_712_new_root_struct(path_struct->root_struct);
+#ifdef HAVE_EIP712_HALF_BLIND
+    }
+#endif // HAVE_EIP712_HALF_BLIND
     return true;
 }
 
diff --git a/src_features/signMessageEIP712/ui_logic.c b/src_features/signMessageEIP712/ui_logic.c
index e6048ce..67869bc 100644
--- a/src_features/signMessageEIP712/ui_logic.c
+++ b/src_features/signMessageEIP712/ui_logic.c
@@ -63,6 +63,7 @@ void    ui_712_new_root_struct(const void *const struct_ptr)
     {
         return;
     }
+
     strcpy(strings.tmp.tmp2, "Review struct");
     const char *struct_name;
     uint8_t struct_name_length;
@@ -82,6 +83,20 @@ void    ui_712_new_root_struct(const void *const struct_ptr)
     }
 }
 
+#ifdef HAVE_EIP712_HALF_BLIND
+void    ui_712_message_hash(void)
+{
+    strcpy(strings.tmp.tmp2, "Message hash");
+    snprintf(strings.tmp.tmp,
+             sizeof(strings.tmp.tmp),
+             "0x%.*H",
+             KECCAK256_HASH_BYTESIZE,
+             tmpCtx.messageSigningContext712.messageHash);
+    G_ux.flow_stack[G_ux.stack_count - 1].index = 0;
+    ux_flow_next();
+}
+#endif // HAVE_EIP712_HALF_BLIND
+
 /**
  * Used to notify of a new field to review in the current struct (key + value)
  *
@@ -98,6 +113,7 @@ void    ui_712_new_field(const void *const field_ptr, const uint8_t *const data,
     {
         return;
     }
+
     // Key
     if ((key = get_struct_field_keyname(field_ptr, &key_len)) != NULL)
     {
@@ -174,7 +190,10 @@ void    ui_712_end_sign(void)
         return;
     }
     ui_ctx->end_reached = true;
+
+#ifndef HAVE_EIP712_HALF_BLIND
     ui_712_next_field();
+#endif // HAVE_EIP712_HALF_BLIND
 }
 
 /**
diff --git a/src_features/signMessageEIP712/ui_logic.h b/src_features/signMessageEIP712/ui_logic.h
index acfb52c..0458256 100644
--- a/src_features/signMessageEIP712/ui_logic.h
+++ b/src_features/signMessageEIP712/ui_logic.h
@@ -27,6 +27,9 @@ void ui_712_new_field(const void *const field_ptr, const uint8_t *const data, ui
 void ui_712_end_sign(void);
 unsigned int ui_712_approve(const bagl_element_t *e);
 unsigned int ui_712_reject(const bagl_element_t *e);
+#ifdef HAVE_EIP712_HALF_BLIND
+void    ui_712_message_hash(void);
+#endif // HAVE_EIP712_HALF_BLIND
 
 #endif // HAVE_EIP712_FULL_SUPPORT
 
diff --git a/src_features/signMessageEIP712_v0/ui_flow_signMessage712.c b/src_features/signMessageEIP712_v0/ui_flow_signMessage712.c
index 02e9e14..230852e 100644
--- a/src_features/signMessageEIP712_v0/ui_flow_signMessage712.c
+++ b/src_features/signMessageEIP712_v0/ui_flow_signMessage712.c
@@ -1,13 +1,22 @@
 #include "shared_context.h"
 #include "ui_callbacks.h"
 #include "common_712.h"
+#include "ethUtils.h"
 
 void prepare_domain_hash_v0() {
-    snprintf(strings.tmp.tmp, 70, "0x%.*H", 32, tmpCtx.messageSigningContext712.domainHash);
+    snprintf(strings.tmp.tmp,
+             sizeof(strings.tmp.tmp),
+             "0x%.*H",
+             KECCAK256_HASH_BYTESIZE,
+             tmpCtx.messageSigningContext712.domainHash);
 }
 
 void prepare_message_hash_v0() {
-    snprintf(strings.tmp.tmp, 70, "0x%.*H", 32, tmpCtx.messageSigningContext712.messageHash);
+    snprintf(strings.tmp.tmp,
+             sizeof(strings.tmp.tmp),
+             "0x%.*H",
+             KECCAK256_HASH_BYTESIZE,
+             tmpCtx.messageSigningContext712.messageHash);
 }
 
 // clang-format off