diff --git a/src/http_management.ml b/src/http_management.ml
index 33f76b2f..27701045 100644
--- a/src/http_management.ml
+++ b/src/http_management.ml
@@ -74,8 +74,13 @@ module Keys_get = struct
     let future_denoms =
       Secmod.get_denoms_data sm
       |> List.filter (fun k -> Option.is_none k.Denom_data.master_sig)
-      |> List.map (fun denom ->
-          mk_future_denom ~sm ~section_name:"TODO section_name" denom)
+      |> List.map (fun dn_data ->
+          let opt =
+            Secmod.find_denom_section_name sm dn_data.Denom_data.h_pub
+          in
+          match opt with
+          | None -> Fmt.failwith "section_name not found."
+          | Some section_name -> mk_future_denom ~sm ~section_name dn_data)
     in
     let master_pub = Config.Exchange.master_public_key in
     let denom_secmod_public_key = Secmod.get_sm_key_pub sm in
diff --git a/src/secmod.ml b/src/secmod.ml
index 901d9b6d..15e9ccc7 100644
--- a/src/secmod.ml
+++ b/src/secmod.ml
@@ -27,6 +27,7 @@ type t = {
   sk_revoked_ht:
     (eddsa_pub, signkey * Bin_sig.MasterSigningKeyRevocation.t) Hashtbl.t;
   dn_ht: (denomination_hash, denom) Hashtbl.t;
+  dn_section_name_ht: (denomination_hash, string) Hashtbl.t;
   dn_revoked_ht:
     ( denomination_hash,
       denom * Bin_sig.MasterDenominationKeyRevocation.t )
@@ -83,6 +84,10 @@ let find_signkey_data t pub =
 let find_denom_data t h_denom =
   find_denom t h_denom |> Option.map (fun v -> v.dn_data)
 
+let find_denom_section_name t h_denom =
+  Miou.Mutex.protect t.lock @@ fun () ->
+  Hashtbl.find_opt t.dn_section_name_ht h_denom
+
 let add_signkey_master_signatures conn t l =
   Miou.Mutex.protect t.lock @@ fun () ->
   list_iter
@@ -223,6 +228,7 @@ let load conn =
     let* l = list_map (fun fname -> load_signkey conn fname) l in
     match opt_list l with Error () -> error_invalid_state | Ok opt -> Ok opt
   in
+  let dn_section_name_ht = Hashtbl.create 0xff in
   let* denoms =
     let* l =
       let open Config.Coin in
@@ -236,6 +242,7 @@ let load conn =
           | Some priv ->
               (* todo: could check that coin config match db values *)
               let* dn_data = db_lookup_denom_data conn ~section_name priv in
+              Hashtbl.replace dn_section_name_ht dn_data.h_pub section_name;
               let denom = { priv; dn_data } in
               Ok (Some denom))
         all_coins
@@ -272,6 +279,7 @@ let load conn =
              sk_ht;
              sk_revoked_ht;
              dn_ht;
+             dn_section_name_ht;
              dn_revoked_ht;
            })
   | _, _, _ -> error_invalid_state
@@ -349,16 +357,28 @@ let make_new () =
     |> List.to_seq
     |> Hashtbl.of_seq
   in
+  let dn_section_name_ht = Hashtbl.create 0xff in
   let dn_ht =
     Config.Coin.all_coins
-    |> List.map make_new_denom
-    |> List.map (fun v -> (v.dn_data.h_pub, v))
+    |> List.map (fun coin ->
+        let denom = make_new_denom coin in
+        Hashtbl.replace dn_section_name_ht denom.dn_data.h_pub coin.section_name;
+        (denom.dn_data.h_pub, denom))
     |> List.to_seq
     |> Hashtbl.of_seq
   in
   let sk_revoked_ht = Hashtbl.create 0xff in
   let dn_revoked_ht = Hashtbl.create 0xff in
-  { lock; sm_key_priv; sm_key_pub; sk_ht; sk_revoked_ht; dn_ht; dn_revoked_ht }
+  {
+    lock;
+    sm_key_priv;
+    sm_key_pub;
+    sk_ht;
+    sk_revoked_ht;
+    dn_ht;
+    dn_section_name_ht;
+    dn_revoked_ht;
+  }
 
 let init conn =
   match load conn with
diff --git a/src/secmod.mli b/src/secmod.mli
index 176a1313..f7f6a3d0 100644
--- a/src/secmod.mli
+++ b/src/secmod.mli
@@ -15,6 +15,7 @@ val get_signkeys_data : t -> Signkey_data.t list
 val get_denoms_data : t -> Denom_data.t list
 val find_signkey_data : t -> eddsa_pub -> Signkey_data.t option
 val find_denom_data : t -> denomination_hash -> Denom_data.t option
+val find_denom_section_name : t -> denomination_hash -> string option
 
 (* - management operations - *)
 val init : (module Pg.CONN) -> t