diff --git a/src/ECCX08.cpp b/src/ECCX08.cpp
index 0164343..3b7383e 100644
--- a/src/ECCX08.cpp
+++ b/src/ECCX08.cpp
@@ -548,6 +548,54 @@ int ECCX08Class::nonce(const byte data[])
   return challenge(data);
 }
 
+long ECCX08Class::incrementCounter(int keyId)
+{
+  uint32_t counter;  // the counter can go up to 2,097,151
+
+  if (!wakeup()) {
+    return -1;
+  }
+
+  if (!sendCommand(0x24, 1, keyId)) {
+    return -1;
+  }
+
+  delay(20);
+
+  if (!receiveResponse(&counter, sizeof(counter))) {
+    return -1;
+  }
+
+  delay(1);
+  idle();
+
+  return counter;
+}
+
+long ECCX08Class::readCounter(int keyId)
+{
+  uint32_t counter;  // the counter can go up to 2,097,151
+
+  if (!wakeup()) {
+    return -1;
+  }
+
+  if (!sendCommand(0x24, 0, keyId)) {
+    return -1;
+  }
+
+  delay(20);
+
+  if (!receiveResponse(&counter, sizeof(counter))) {
+    return -1;
+  }
+
+  delay(1);
+  idle();
+
+  return counter;
+}
+
 int ECCX08Class::wakeup()
 {
   _wire->setClock(_wakeupFrequency);
@@ -892,4 +940,4 @@ uint16_t ECCX08Class::crc16(const byte data[], size_t length)
 ECCX08Class ECCX08(CRYPTO_WIRE, 0x60);
 #else
 ECCX08Class ECCX08(Wire, 0x60);
-#endif
\ No newline at end of file
+#endif
diff --git a/src/ECCX08.h b/src/ECCX08.h
index 54fdc3a..ead8468 100644
--- a/src/ECCX08.h
+++ b/src/ECCX08.h
@@ -66,6 +66,9 @@ class ECCX08Class
 
   int nonce(const byte data[]);
 
+  long incrementCounter(int keyId);
+  long readCounter(int keyId);
+
 private:
   int wakeup();
   int sleep();