diff --git a/include/bank.hpp b/include/bank.hpp
index fa3f20b..51e9320 100644
--- a/include/bank.hpp
+++ b/include/bank.hpp
@@ -2,6 +2,7 @@
 #include <fstream>
 #include <shared_mutex>
 #include <vector>
+#include <xxh3.h>
 #include "parallel-hashmap/parallel_hashmap/phmap.h"
 #include "user.hpp"
 
@@ -53,7 +54,7 @@ public:
     bool DelUser(const std::string &name, const std::string &attempt)
     {
         std::unique_lock<std::shared_mutex> lock{size_lock};
-        return users.erase_if(name, [&attempt](const User &u) { return (std::hash<std::string>{}(attempt) == u.password); });
+        return users.erase_if(name, [&attempt](const User &u) { return (XXH64(attempt.data(), attempt.size(), 0) == u.password); });
     }
     bool AdminDelUser(const std::string &name, const std::string &attempt)
     {
@@ -74,7 +75,7 @@ public:
         bool state = false;
         std::shared_lock<std::shared_mutex> lock{send_funds_l}; //because SendFunds requires 3 locking operations
         users.modify_if(a_name, [&state, amount, &attempt](User &a) {
-            if (state = (a.balance >= amount) && (a.password == std::hash<std::string>{}(attempt)), state)
+            if (state = (a.balance >= amount) && (a.password == XXH64(attempt.data(), attempt.size(), 0)), state)
             {
                 a.balance -= amount;
             }
@@ -125,7 +126,7 @@ public:
     {
         int_fast8_t res = -1;
         users.if_contains(name, [&res, &attempt](const User &u) {
-            res = u.password == std::hash<std::string>{}(attempt);
+            res = u.password == XXH64(attempt.data(), attempt.size(), 0);
         });
         return res;
     }
@@ -133,7 +134,7 @@ public:
     {
         int_fast8_t res = -1;
         users.modify_if(name, [&res, &attempt, &new_pass](User &u) {
-            res = (u.password == std::hash<std::string>{}(attempt));
+            res = (u.password == XXH64(attempt.data(), attempt.size(), 0));
             if (res)
             {
                 u.password = std::hash<std::string>{}(new_pass);
diff --git a/include/user.hpp b/include/user.hpp
index b3e3ebe..a54d883 100644
--- a/include/user.hpp
+++ b/include/user.hpp
@@ -5,14 +5,14 @@
 struct User
 {
     uint_fast32_t balance = 0;
-    size_t password;
+    uint_fast64_t password;
 
     /**
      * @brief User constructor
      * 
      * @param init_pass initial password
      */
-    User(std::string &&init_pass) : password(std::hash<std::string>{}(init_pass)) {}
+    User(std::string &&init_pass) : password(XXH64(init_pass.data(), init_pass.size(), 0)) {}
 
     /**
      * @brief User Constructor for admins
@@ -20,7 +20,7 @@ struct User
      * @param init_bal initial balance
      * @param init_pass initial password 
      */
-    User(uint_fast32_t init_bal, std::string &&init_pass) : balance(init_bal), password(std::hash<std::string>{}(init_pass)) {}
+    User(uint_fast32_t init_bal, std::string &&init_pass) : balance(init_bal), password(XXH64(init_pass.data(), init_pass.size(), 0)) {}
 
     Json::Value Serialize() const
     {