Android Simple String Encryption (using own/static key)

class CipherHelper(val algorithm: String, val transformation: String, val iv: String? = null) {    companion object {        private const val ALGO_BLOWFISH = "Blowfish"        private const val ALGO_AES = "AES"        private const val ALGO_DES = "DES"        // iv length of 8        fun getBlowfishInstance(iv: String) = CipherHelper(ALGO_BLOWFISH, "Blowfish/CBC/PKCS5Padding", iv)        // iv length of 16        fun getAESInstance(iv: String) = CipherHelper(ALGO_AES, "AES/CBC/PKCS5Padding", iv)        // iv length is 8        fun getDESInstance(iv: String) = CipherHelper(ALGO_DES, "DES/CBC/PKCS5Padding", iv)    }    private val cipher by lazy { Cipher.getInstance(transformation)  }    fun getSecretKey(secret: String): SecretKeySpec {        val hash = when (algorithm) {            ALGO_DES -> {                val spec = DESKeySpec(secret.toByteArray())                val f = SecretKeyFactory.getInstance("DES")                f.generateSecret(spec).encoded            }            ALGO_AES -> {                val random = SecureRandom()                val salt = ByteArray(16)                random.nextBytes(salt)                val spec = PBEKeySpec(secret.toCharArray(), salt, 65536, 128)                val f = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1")                f.generateSecret(spec).encoded            }            else -> { // BLOWFISH                secret.toByteArray()            }        }        return SecretKeySpec(hash, algorithm)    }    fun encrypt(secret: SecretKey, value: String): String {        val iv = IvParameterSpec(iv?.toByteArray())        cipher.init(Cipher.ENCRYPT_MODE, secret, iv)        val data = cipher.doFinal(value.toByteArray())        return Base64.encodeToString(data, Base64.DEFAULT)    }    fun decrypt(secret: SecretKey, value: String): String {        val iv = IvParameterSpec(iv?.toByteArray())        cipher.init(Cipher.DECRYPT_MODE, secret, iv)        val data = Base64.decode( value, Base64.DEFAULT)        return String(cipher.doFinal(data))    }}

val iv = "c16(}Hhx"val cipher = CipherHelper.getBlowfishInstance(iv)val secretKey = cipher.getSecretKey("3hb1L0x7moZA7OWtmi_mHPtxwl2GNxIDkk7A7bPM-Xo")val value = "I am Desmond"val encryptedValue = cipher.encrypt(secretKey, value)val decryptedValue = cipher.decrypt(secretKey, encryptedValue)