diff --git a/src/bootstrap/app.rs b/src/bootstrap/app.rs
index 557203b0..7fb1bf7c 100644
--- a/src/bootstrap/app.rs
+++ b/src/bootstrap/app.rs
@@ -4,8 +4,10 @@ use std::sync::Arc;
 use torrust_tracker_configuration::Configuration;
 
 use crate::bootstrap::stats;
+use crate::shared::clock::static_time;
+use crate::shared::crypto::ephemeral_instance_keys;
 use crate::tracker::Tracker;
-use crate::{bootstrap, ephemeral_instance_keys, static_time, tracker};
+use crate::{bootstrap, tracker};
 
 /// # Panics
 ///
diff --git a/src/lib.rs b/src/lib.rs
index cf4439c3..bd775f8c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,22 +6,3 @@ pub mod tracker;
 
 #[macro_use]
 extern crate lazy_static;
-
-pub mod static_time {
-    use std::time::SystemTime;
-
-    lazy_static! {
-        pub static ref TIME_AT_APP_START: SystemTime = SystemTime::now();
-    }
-}
-
-pub mod ephemeral_instance_keys {
-    use rand::rngs::ThreadRng;
-    use rand::Rng;
-
-    pub type Seed = [u8; 32];
-
-    lazy_static! {
-        pub static ref RANDOM_SEED: Seed = Rng::gen(&mut ThreadRng::default());
-    }
-}
diff --git a/src/shared/clock/mod.rs b/src/shared/clock/mod.rs
index 399fb6b9..b5001e10 100644
--- a/src/shared/clock/mod.rs
+++ b/src/shared/clock/mod.rs
@@ -1,3 +1,4 @@
+pub mod static_time;
 pub mod time_extent;
 pub mod utils;
 
@@ -289,8 +290,7 @@ mod stopped_clock {
         use std::cell::RefCell;
         use std::time::SystemTime;
 
-        use crate::shared::clock::DurationSinceUnixEpoch;
-        use crate::static_time;
+        use crate::shared::clock::{static_time, DurationSinceUnixEpoch};
 
         pub fn get_app_start_time() -> DurationSinceUnixEpoch {
             (*static_time::TIME_AT_APP_START)
diff --git a/src/shared/clock/static_time.rs b/src/shared/clock/static_time.rs
new file mode 100644
index 00000000..f916cec9
--- /dev/null
+++ b/src/shared/clock/static_time.rs
@@ -0,0 +1,5 @@
+use std::time::SystemTime;
+
+lazy_static! {
+    pub static ref TIME_AT_APP_START: SystemTime = SystemTime::now();
+}
diff --git a/src/shared/crypto.rs b/src/shared/crypto.rs
index 848dcd36..c10a417c 100644
--- a/src/shared/crypto.rs
+++ b/src/shared/crypto.rs
@@ -1,8 +1,19 @@
+pub mod ephemeral_instance_keys {
+    use rand::rngs::ThreadRng;
+    use rand::Rng;
+
+    pub type Seed = [u8; 32];
+
+    lazy_static! {
+        pub static ref RANDOM_SEED: Seed = Rng::gen(&mut ThreadRng::default());
+    }
+}
+
 pub mod keys {
 
     pub mod seeds {
         use self::detail::CURRENT_SEED;
-        use crate::ephemeral_instance_keys::{Seed, RANDOM_SEED};
+        use crate::shared::crypto::ephemeral_instance_keys::{Seed, RANDOM_SEED};
 
         pub trait Keeper {
             type Seed: Sized + Default + AsMut<[u8]>;
@@ -33,7 +44,7 @@ pub mod keys {
         mod tests {
             use super::detail::ZEROED_TEST_SEED;
             use super::{Current, Instance, Keeper};
-            use crate::ephemeral_instance_keys::Seed;
+            use crate::shared::crypto::ephemeral_instance_keys::Seed;
 
             pub struct ZeroedTestSeed;
 
@@ -58,7 +69,7 @@ pub mod keys {
         }
 
         mod detail {
-            use crate::ephemeral_instance_keys::Seed;
+            use crate::shared::crypto::ephemeral_instance_keys::Seed;
 
             #[allow(dead_code)]
             pub const ZEROED_TEST_SEED: &Seed = &[0u8; 32];
@@ -67,13 +78,13 @@ pub mod keys {
             pub use ZEROED_TEST_SEED as CURRENT_SEED;
 
             #[cfg(not(test))]
-            pub use crate::ephemeral_instance_keys::RANDOM_SEED as CURRENT_SEED;
+            pub use crate::shared::crypto::ephemeral_instance_keys::RANDOM_SEED as CURRENT_SEED;
 
             #[cfg(test)]
             mod tests {
                 use std::convert::TryInto;
 
-                use crate::ephemeral_instance_keys::RANDOM_SEED;
+                use crate::shared::crypto::ephemeral_instance_keys::RANDOM_SEED;
                 use crate::shared::crypto::keys::seeds::detail::ZEROED_TEST_SEED;
                 use crate::shared::crypto::keys::seeds::CURRENT_SEED;
 
diff --git a/tests/common/tracker.rs b/tests/common/tracker.rs
index 1d06009b..92c1df7b 100644
--- a/tests/common/tracker.rs
+++ b/tests/common/tracker.rs
@@ -1,8 +1,10 @@
 use std::sync::Arc;
 
+use torrust_tracker::bootstrap;
+use torrust_tracker::shared::clock::static_time;
+use torrust_tracker::shared::crypto::ephemeral_instance_keys;
 use torrust_tracker::tracker::services::common::tracker_factory;
 use torrust_tracker::tracker::Tracker;
-use torrust_tracker::{bootstrap, ephemeral_instance_keys, static_time};
 
 // TODO: Move to test-helpers crate once `Tracker` is isolated.
 #[allow(clippy::module_name_repetitions)]