generating,encrypting and decrypting on three dfferent page using RSA public and private key in laravel9

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Crypt;

// Generate a new public/private key pair
$keyPair = openssl_pkey_new([
    "digest_alg" => "sha256",
    "private_key_bits" => 2048,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
]);

// Get the private key
openssl_pkey_export($keyPair, $privateKey);

// Get the public key
$keyDetails = openssl_pkey_get_details($keyPair);
$publicKey = $keyDetails["key"];

// Store the keys in the session for later use
session()->put("privateKey", $privateKey);
session()->put("publicKey", $publicKey);

// Display the public key for the user to copy and paste
echo "<pre>" . $publicKey . "</pre>";

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Crypt;

// Get the user's input from the request
$input = $request->input("data");

// Get the public key from the session
$publicKey = session()->get("publicKey");

// Encrypt the input using the public key
$encrypted = Crypt::encryptString($input, $publicKey);

// Display the encrypted data for the user to copy and paste
echo "<pre>" . $encrypted . "</pre>";

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Crypt;

// Get the encrypted data from the request
$encrypted = $request->input("data");

// Get the private key from the session
$privateKey = session()->get("privateKey");

// Decrypt the data using the private key
$decrypted = Crypt::decryptString($encrypted, $privateKey);

// Display the decrypted data for the user to view
echo "<pre>" . $decrypted . "</pre>";