China tightens control over app stores

China is requiring that all app stores operating in the country register with its Cyberspace Administration in an effort to battle malware but also to tighten control over uncensored content.The rules took effect Monday, in a country where domestic third-party app stores -- not from Apple or Google -- are serving billions of downloads to Android smartphones. Chinese internet companies such as Baidu, Tencent and a host of smaller, shadier local app stores have been feeding the demand, at a time w