verification function造句

in these cases, some digital image verification functions are very hard to be implemented by traditional information security technology . for example, the verification and location to the changed pixels of image are hard to implemented with traditional method
数字图像完整性验证的特殊需求，导致了基于数字水印技术的图像完整性与身份验证方法的提出与发展，它是数字水印技术与信息安全技术的一个新的研究课题。
to avoid malicious attacks, the system provided are required to have id verification function and to prevent reproduction and protect intelligence property rights . a digital signature is required before the use of a service . the system should be able to track the invader and set up a blacklist
要求提供的系统具有身份认证功能，以防恶意攻击；享受服务要通过数字签名，以防复制，保护知识产权；系统要能对侵入者进行追踪，以便确定黑名单。
It's difficult to find verification function in a sentence. 用verification function造句挺难的