diff --git a/src/cache/mod.rs b/src/cache/mod.rs
index 710c67c..92612cf 100644
--- a/src/cache/mod.rs
+++ b/src/cache/mod.rs
@@ -21,10 +21,12 @@ use serde::{Deserialize, Serialize};
 
 #[cfg(feature = "full")]
 pub mod hashcache;
+//#[cfg(feature = "full")]
+//pub mod redis;
 
 #[derive(Serialize, Deserialize)]
 pub struct AddChallenge {
-    pub difficulty: usize,
+    pub difficulty: u32,
     pub duration: u64,
     pub challenge: String,
 }
diff --git a/src/cache/redis.rs b/src/cache/redis.rs
index ae40835..5273550 100644
--- a/src/cache/redis.rs
+++ b/src/cache/redis.rs
@@ -16,16 +16,18 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 //! Cache implementation that uses Redis
-use crate::redis::Redis;
+use crate::redis::mcaptcha_redis::MCaptchaRedis;
+use crate::redis::RedisConfig;
 use std::collections::HashMap;
 
 use actix::prelude::*;
 
 use super::messages::*;
+use super::AddChallenge;
 use super::Save;
 use crate::errors::*;
 
-pub struct RedisCache(Redis);
+pub struct RedisCache(MCaptchaRedis);
 
 #[derive(Clone, Default)]
 /// cache datastructure implementing [Save]
@@ -35,15 +37,26 @@ pub struct HashCache {
 }
 
 impl RedisCache {
+    /// Get new [MCaptchaRedis]. Use this when executing commands that are
+    /// only supported by mCaptcha Redis module. Internally, when object
+    /// is created, checks are performed to check if the module is loaded and if
+    /// the required commands are available
+    pub async fn new(redis: RedisConfig) -> CaptchaResult<Self> {
+        let m = MCaptchaRedis::new(redis).await?;
+        Ok(Self(m))
+    }
+
     // save [PoWConfig] to cache
     async fn save_pow_config(&mut self, config: CachePoW) -> CaptchaResult<()> {
         let challenge = config.string;
-        let config: CachedPoWConfig = CachedPoWConfig {
-            key: config.key,
-            difficulty_factor: config.difficulty_factor,
+        let payload: AddChallenge = AddChallenge {
+            challenge: config.string,
+            difficulty: config.difficulty_factor as usize,
             duration: config.duration,
         };
 
+        let payload = serde_json::to_string(&payload).unwrap();
+
         // {MCAPTCHA_NAME}:difficulty_map:challenge (difficulty_factor -> duration) EX duration
 
         // TODO use hashmap
diff --git a/src/master/redis/master.rs b/src/master/redis/master.rs
index 9d1df46..7de8f41 100644
--- a/src/master/redis/master.rs
+++ b/src/master/redis/master.rs
@@ -19,10 +19,10 @@ use std::sync::mpsc;
 
 use actix::dev::*;
 
-use super::connection::MCaptchaRedis;
 use crate::errors::*;
 use crate::master::messages::{AddSite, AddVisitor};
 use crate::master::Master as MasterTrait;
+use crate::redis::mcaptcha_redis::MCaptchaRedis;
 use crate::redis::RedisConfig;
 
 pub struct Master {
diff --git a/src/master/redis/mod.rs b/src/master/redis/mod.rs
index fbed376..09f3c9a 100644
--- a/src/master/redis/mod.rs
+++ b/src/master/redis/mod.rs
@@ -16,5 +16,4 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-pub mod connection;
 pub mod master;
diff --git a/src/master/redis/connection.rs b/src/redis/mcaptcha_redis.rs
similarity index 74%
rename from src/master/redis/connection.rs
rename to src/redis/mcaptcha_redis.rs
index ab57d55..d6f5f99 100644
--- a/src/master/redis/connection.rs
+++ b/src/redis/mcaptcha_redis.rs
@@ -17,6 +17,8 @@
  */
 use redis::Value;
 
+use crate::cache::messages::VerifyCaptchaResult;
+use crate::cache::AddChallenge;
 use crate::errors::*;
 use crate::master::messages::{AddSite, AddVisitor};
 use crate::master::AddVisitorResult;
@@ -36,6 +38,8 @@ const ADD_VISITOR: &str = "MCAPTCHA_CACHE.ADD_VISITOR";
 const DEL: &str = "MCAPTCHA_CACHE.DELETE_CAPTCHA";
 const ADD_CAPTCHA: &str = "MCAPTCHA_CACHE.ADD_CAPTCHA";
 const CAPTCHA_EXISTS: &str = "MCAPTCHA_CACHE.CAPTCHA_EXISTS";
+const ADD_CHALLENGE: &str = "MCAPTCHA_CACHE.ADD_CHALLENGE";
+const GET_CHALLENGE: &str = "MCAPTCHA_CACHE.GET_CHALLENGE";
 
 const MODULE_NAME: &str = "mcaptcha_cahce";
 
@@ -74,7 +78,15 @@ impl MCaptchaRedisConnection {
             }
         }
 
-        let commands = vec![ADD_VISITOR, ADD_CAPTCHA, DEL, CAPTCHA_EXISTS, GET];
+        let commands = vec![
+            ADD_VISITOR,
+            ADD_CAPTCHA,
+            DEL,
+            CAPTCHA_EXISTS,
+            GET,
+            ADD_CHALLENGE,
+            GET_CHALLENGE,
+        ];
 
         for cmd in commands.iter() {
             if let Value::Bulk(mut val) = self
@@ -138,6 +150,31 @@ impl MCaptchaRedisConnection {
         Ok(())
     }
 
+    /// Delete an mCaptcha object from Redis
+    pub async fn add_challenge(
+        &self,
+        captcha: &str,
+        challlenge: &AddChallenge,
+    ) -> CaptchaResult<()> {
+        let payload = serde_json::to_string(challlenge).unwrap();
+        self.0
+            .exec(redis::cmd(ADD_CHALLENGE).arg(&[captcha, &payload]))
+            .await?;
+        Ok(())
+    }
+
+    /// Delete an mCaptcha object from Redis
+    pub async fn get_challenge(
+        &self,
+        msg: &VerifyCaptchaResult,
+    ) -> CaptchaResult<AddVisitorResult> {
+        let challege: String = self
+            .0
+            .exec(redis::cmd(GET_CHALLENGE).arg(&[&msg.key, &msg.token]))
+            .await?;
+        Ok(serde_json::from_str(&challege).unwrap())
+    }
+
     /// Get number of visitors of an mCaptcha object from Redis
     pub async fn get_visitors(&self, captcha: &str) -> CaptchaResult<usize> {
         let visitors: usize = self.0.exec(redis::cmd(GET).arg(&[captcha])).await?;
@@ -153,6 +190,7 @@ pub mod tests {
 
     const CAPTCHA_NAME: &str = "REDIS_CAPTCHA_TEST";
     const REDIS_URL: &str = "redis://127.0.1.1/";
+    const CHALLENGE: &str = "randomchallengestring";
 
     #[actix_rt::test]
     async fn redis_master_works() {
@@ -165,11 +203,15 @@ pub mod tests {
         {
             let _ = r.delete_captcha(CAPTCHA_NAME).await;
         }
+
+        let mcaptcha = get_mcaptcha();
+        // let duration = mcaptcha.get_duration();
+
         assert!(r.is_module_loaded().await.is_ok());
         assert!(!r.check_captcha_exists(CAPTCHA_NAME).await.unwrap());
         let add_mcaptcha_msg = AddSite {
             id: CAPTCHA_NAME.into(),
-            mcaptcha: get_mcaptcha(),
+            mcaptcha,
         };
 
         assert!(r.add_mcaptcha(add_mcaptcha_msg).await.is_ok());
@@ -181,10 +223,32 @@ pub mod tests {
         assert_eq!(visitors, 1);
 
         let add_visitor_msg = AddVisitor(CAPTCHA_NAME.into());
-        assert!(r.add_visitor(add_visitor_msg).await.is_ok());
+        let resp = r.add_visitor(add_visitor_msg.clone()).await;
+        assert!(resp.is_ok());
+        assert!(resp.unwrap().is_some());
         let visitors = r.get_visitors(CAPTCHA_NAME).await.unwrap();
         assert_eq!(visitors, 2);
 
+        let add_visitor_res = r.add_visitor(add_visitor_msg).await.unwrap().unwrap();
+        let add_challenge_msg = AddChallenge {
+            difficulty: add_visitor_res.difficulty_factor,
+            duration: add_visitor_res.duration,
+            challenge: CHALLENGE.into(),
+        };
+
+        assert!(r
+            .add_challenge(CAPTCHA_NAME, &add_challenge_msg)
+            .await
+            .is_ok());
+
+        let verify_msg = VerifyCaptchaResult {
+            token: CHALLENGE.into(),
+            key: CAPTCHA_NAME.into(),
+        };
+        let x = r.get_challenge(&verify_msg).await.unwrap();
+        assert_eq!(x.duration, add_challenge_msg.duration);
+        assert_eq!(x.difficulty_factor, add_challenge_msg.difficulty);
+
         assert!(r.delete_captcha(CAPTCHA_NAME).await.is_ok());
     }
 }
diff --git a/src/redis.rs b/src/redis/mod.rs
similarity index 99%
rename from src/redis.rs
rename to src/redis/mod.rs
index 7f3e971..4f0bee3 100644
--- a/src/redis.rs
+++ b/src/redis/mod.rs
@@ -24,6 +24,7 @@ use redis::Client;
 use redis::FromRedisValue;
 use redis::{aio::Connection, cluster::ClusterConnection};
 
+pub mod mcaptcha_redis;
 use crate::errors::*;
 
 /// Client configuration