diff --git a/crates/lox-library/src/bridge_table.rs b/crates/lox-library/src/bridge_table.rs
index 6f385a6..aa64d98 100644
--- a/crates/lox-library/src/bridge_table.rs
+++ b/crates/lox-library/src/bridge_table.rs
@@ -207,10 +207,12 @@ impl BridgeLine {
 /// the encrypted buckets.  The encrypted buckets will be exposed to the
 /// users of the system, and each user credential will contain the
 /// decryption key for one bucket.
-#[derive(Debug, Default)]
+#[serde_as]
+#[derive(Debug, Default, Serialize, Deserialize)]
 pub struct BridgeTable {
     pub keys: Vec<[u8; 16]>,
     pub buckets: Vec<[BridgeLine; MAX_BRIDGES_PER_BUCKET]>,
+    #[serde_as(as = "Vec<[_; ENC_BUCKET_BYTES]>")]
     pub encbuckets: Vec<[u8; ENC_BUCKET_BYTES]>,
     /// Individual bridges that are reachable
     pub reachable: HashMap<BridgeLine, Vec<(u32, usize)>>,
diff --git a/crates/lox-library/src/dup_filter.rs b/crates/lox-library/src/dup_filter.rs
index 3a2a797..6f874ba 100644
--- a/crates/lox-library/src/dup_filter.rs
+++ b/crates/lox-library/src/dup_filter.rs
@@ -8,10 +8,12 @@ use std::cmp::Eq;
 use std::collections::HashMap;
 use std::hash::Hash;
 
+use serde::{Deserialize, Serialize};
+
 /// Each instance of DupFilter maintains its own independent table of
 /// seen ids.  IdType will typically be Scalar.
-#[derive(Default, Debug)]
-pub struct DupFilter<IdType> {
+#[derive(Default, Debug, Serialize, Deserialize)]
+pub struct DupFilter<IdType: Hash + Eq + Copy + Serialize> {
     seen_table: HashMap<IdType, ()>,
 }
 
@@ -23,7 +25,7 @@ pub enum SeenType {
     Seen,
 }
 
-impl<IdType: Hash + Eq + Copy> DupFilter<IdType> {
+impl<IdType: Hash + Eq + Copy + Serialize> DupFilter<IdType> {
     /// Check to see if the id is in the seen table, but do not add it
     /// to the seen table.  Return Seen if it is already in the table,
     /// Fresh if not.
diff --git a/crates/lox-library/src/lib.rs b/crates/lox-library/src/lib.rs
index 65709e0..0cd9b45 100644
--- a/crates/lox-library/src/lib.rs
+++ b/crates/lox-library/src/lib.rs
@@ -47,7 +47,7 @@ use migration_table::{MigrationTable, MigrationType};
 
 use lazy_static::lazy_static;
 
-use serde::{Serialize, Deserialize};
+use serde::{Deserialize, Serialize};
 
 lazy_static! {
     pub static ref CMZ_A: RistrettoPoint =
@@ -197,7 +197,7 @@ impl Default for BridgeDb {
 }
 
 /// The bridge authority.  This will typically be a singleton object.
-#[derive(Debug)]
+#[derive(Debug, Serialize, Deserialize)]
 pub struct BridgeAuth {
     /// The private key for the main Lox credential
     lox_priv: IssuerPrivKey,
@@ -241,6 +241,7 @@ pub struct BridgeAuth {
     trust_promotion_filter: dup_filter::DupFilter<Scalar>,
 
     /// For testing only: offset of the true time to the simulated time
+    #[serde(skip)]
     time_offset: time::Duration,
 }
 
diff --git a/crates/lox-library/src/migration_table.rs b/crates/lox-library/src/migration_table.rs
index 86d5aa8..9f98c34 100644
--- a/crates/lox-library/src/migration_table.rs
+++ b/crates/lox-library/src/migration_table.rs
@@ -22,6 +22,8 @@ use rand::RngCore;
 
 use std::collections::HashMap;
 
+use serde::{Deserialize, Serialize};
+
 use super::bridge_table;
 use super::cred::Migration;
 use super::IssuerPrivKey;
@@ -57,7 +59,7 @@ impl From<MigrationType> for Scalar {
 }
 
 /// The migration table
-#[derive(Default, Debug)]
+#[derive(Default, Debug, Serialize, Deserialize)]
 pub struct MigrationTable {
     pub table: HashMap<u32, u32>,
     pub migration_type: Scalar,