// TODO: add support for EC keys
} else if (jwk instanceof OctetSequenceKey) {
// build symmetric encrypters and decrypters
DirectEncrypter encrypter = new DirectEncrypter(((OctetSequenceKey) jwk).toByteArray());
DirectDecrypter decrypter = new DirectDecrypter(((OctetSequenceKey) jwk).toByteArray());
encrypters.put(id, encrypter);
decrypters.put(id, decrypter);