diff --git a/system/Security/Security.php b/system/Security/Security.php
index c96ff56efb80..33a9ba002b2d 100644
--- a/system/Security/Security.php
+++ b/system/Security/Security.php
@@ -233,46 +233,6 @@ private function configureCookie(CookieConfig $cookie): void
         Cookie::setDefaults($cookie);
     }
 
-    /**
-     * CSRF Verify
-     *
-     * @return $this|false
-     *
-     * @throws SecurityException
-     *
-     * @deprecated Use `CodeIgniter\Security\Security::verify()` instead of using this method.
-     *
-     * @codeCoverageIgnore
-     */
-    public function CSRFVerify(RequestInterface $request)
-    {
-        return $this->verify($request);
-    }
-
-    /**
-     * Returns the CSRF Token.
-     *
-     * @deprecated Use `CodeIgniter\Security\Security::getHash()` instead of using this method.
-     *
-     * @codeCoverageIgnore
-     */
-    public function getCSRFHash(): ?string
-    {
-        return $this->getHash();
-    }
-
-    /**
-     * Returns the CSRF Token Name.
-     *
-     * @deprecated Use `CodeIgniter\Security\Security::getTokenName()` instead of using this method.
-     *
-     * @codeCoverageIgnore
-     */
-    public function getCSRFTokenName(): string
-    {
-        return $this->getTokenName();
-    }
-
     /**
      * CSRF Verify
      *
@@ -446,18 +406,6 @@ public function getCookieName(): string
         return $this->config->cookieName;
     }
 
-    /**
-     * Check if CSRF cookie is expired.
-     *
-     * @deprecated
-     *
-     * @codeCoverageIgnore
-     */
-    public function isExpired(): bool
-    {
-        return $this->cookie->isExpired();
-    }
-
     /**
      * Check if request should be redirect on failure.
      */
@@ -590,40 +538,6 @@ private function saveHashInCookie(): void
         $response->setCookie($this->cookie);
     }
 
-    /**
-     * CSRF Send Cookie
-     *
-     * @return false|Security
-     *
-     * @deprecated Set cookies to Response object instead.
-     */
-    protected function sendCookie(RequestInterface $request)
-    {
-        assert($request instanceof IncomingRequest);
-
-        if ($this->cookie->isSecure() && ! $request->isSecure()) {
-            return false;
-        }
-
-        $this->doSendCookie();
-        log_message('info', 'CSRF cookie sent.');
-
-        return $this;
-    }
-
-    /**
-     * Actual dispatching of cookies.
-     * Extracted for this to be unit tested.
-     *
-     * @codeCoverageIgnore
-     *
-     * @deprecated Set cookies to Response object instead.
-     */
-    protected function doSendCookie(): void
-    {
-        cookies([$this->cookie], false)->dispatch();
-    }
-
     private function saveHashInSession(): void
     {
         $this->session->set($this->config->tokenName, $this->hash);
diff --git a/system/Security/SecurityInterface.php b/system/Security/SecurityInterface.php
index a4124b803198..1460cf0e6a00 100644
--- a/system/Security/SecurityInterface.php
+++ b/system/Security/SecurityInterface.php
@@ -50,13 +50,6 @@ public function getHeaderName(): string;
      */
     public function getCookieName(): string;
 
-    /**
-     * Check if CSRF cookie is expired.
-     *
-     * @deprecated
-     */
-    public function isExpired(): bool;
-
     /**
      * Check if request should be redirect on failure.
      */
diff --git a/user_guide_src/source/changelogs/v4.5.0.rst b/user_guide_src/source/changelogs/v4.5.0.rst
index 1997260dd4da..4be91284d68a 100644
--- a/user_guide_src/source/changelogs/v4.5.0.rst
+++ b/user_guide_src/source/changelogs/v4.5.0.rst
@@ -184,6 +184,17 @@ Response
     - ``ResponseTrait::$cookieSameSite``
     - ``ResponseTrait::$cookies``
 
+Security
+--------
+
+- ``SecurityInterface::isExpired()``
+- ``Security::isExpired()``
+- ``Security::CSRFVerify()``
+- ``Security::getCSRFHash()``
+- ``Security::getCSRFTokenName()``
+- ``Security::sendCookie()``
+- ``Security::doSendCookie()``
+
 CodeIgniter
 -----------