fun encrypt(cipherAlgorithm: String, plainText: ByteArray, key: Key): ByteArray? {
    return try {
        val cipher = Cipher.getInstance(cipherAlgorithm)
        cipher.init(Cipher.ENCRYPT_MODE, key)
        val cipherText = cipher.doFinal(plainText)
        cipherText
    } catch (exception: GeneralSecurityException) {
        exception.printStackTrace()
        null
    }
}