This paper proposed a watermarking algorithm for tamper-proof of web pages. For a web page, it generates a watermark consisting of a sequence of Space and Tab. The wa termark is then embedded into the web page after e...This paper proposed a watermarking algorithm for tamper-proof of web pages. For a web page, it generates a watermark consisting of a sequence of Space and Tab. The wa termark is then embedded into the web page after each word and each line. When a watermarked web page is tampered, the extracted watermark can detect and locate the modifications to the web page. Besides, the framework of watermarked Web Server system was given. Compared with traditional digital signature methods, this watermarking method is more transparent in that there is no necessary to detach the watermark before displaying web pages. The e xperimental results show that the proposed scheme is an effective tool for tamper-proof of web pages.展开更多
Dynamic surface patterns(DSPs)have attracted significant interest in anti-counterfeiting,enabling information to be stored,encrypted and decrypted in response to external stimuli.However,creating dynamic surface patte...Dynamic surface patterns(DSPs)have attracted significant interest in anti-counterfeiting,enabling information to be stored,encrypted and decrypted in response to external stimuli.However,creating dynamic surface patterns,capable of controlling wrinkling time and independently modulating different information in both wrinkled and fluorescent states,remains a tremendous challenge.These limit DSPs to further enhance tamper-proofing capacity and extend the information storage density.Here,a rationally designed patterning strategy based on controllable elastic modulus was demonstrated to fabricate self-erasable dynamic surface patterns(S-DSPs)that increase information storage density.These novel S-DSPs strategically integrated amino co-oligomers(ACOs)with the 9-anthracenemethanol(9-AM)as skin layers,designing a bilayer multi-encoding system which could carry several different types of information with wrinkled and fluorescent patterns.The ACOs with relatively low molecular weight can endow the elastic modulus of skin layers with a wide range of regulation.As a result,the difference between the compressive strain and the critical wrinkle strain in the bilayer system would be precisely modulated by photo-dimerization to form quick-response(minimum<1 min)and self-erasable(3 min–8 days)wrinkled patterns for S-DSPs.Meanwhile,the fluorescence pattern could be independently erased and reprogrammed without affecting the change in the wrinkle pattern under modulus-controlled conditions.Moreover,controllable self-erasure in S-DSPs significantly develops tamper-proof capabilities in a supply chain.This original strategy could provide a new approach to the tamper-proof,high-density,and multi-encoded information storage in the product security or inkless printing.展开更多
辅助驾驶和自动驾驶让汽车变得越来越智能,确保汽车安全驾驶的条件之一是要确保上位机和执行器即汽车电子控制单元(Electronic Control Unit,ECU)间的通信数据不被篡改。基于汽车开放系统架构(AUTomotive Open System ARchitecture,AUTO...辅助驾驶和自动驾驶让汽车变得越来越智能,确保汽车安全驾驶的条件之一是要确保上位机和执行器即汽车电子控制单元(Electronic Control Unit,ECU)间的通信数据不被篡改。基于汽车开放系统架构(AUTomotive Open System ARchitecture,AUTOSAR)的板端加密通信(Security Onboard Communication,SecOC)具有防重放和防篡改的特点,可以有效保护ECU间的通信信息。鉴于此,深入研究了SecOC车内网络安全通信,分析了SecOC每个模块的作用与原理,实现了SecOC车内网络安全通信,将该设计应用于某电动助力转向系统的产品中,并创建了基于控制器局域网(Controller Area Network,CAN)开发环境(CAN Open Environment,CANoe)的SecOC仿真模型。最后,通过测试证明了所提模型的有效性和可靠性。展开更多
文摘This paper proposed a watermarking algorithm for tamper-proof of web pages. For a web page, it generates a watermark consisting of a sequence of Space and Tab. The wa termark is then embedded into the web page after each word and each line. When a watermarked web page is tampered, the extracted watermark can detect and locate the modifications to the web page. Besides, the framework of watermarked Web Server system was given. Compared with traditional digital signature methods, this watermarking method is more transparent in that there is no necessary to detach the watermark before displaying web pages. The e xperimental results show that the proposed scheme is an effective tool for tamper-proof of web pages.
基金This work was supported by the National Natural Science Foundations of China(Nos.51903058,51873042,and 51833011)Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education(No.PCFM-2922A02)Guangzhou Basic and Applied Basic Research Foundation(No.202201010382).
文摘Dynamic surface patterns(DSPs)have attracted significant interest in anti-counterfeiting,enabling information to be stored,encrypted and decrypted in response to external stimuli.However,creating dynamic surface patterns,capable of controlling wrinkling time and independently modulating different information in both wrinkled and fluorescent states,remains a tremendous challenge.These limit DSPs to further enhance tamper-proofing capacity and extend the information storage density.Here,a rationally designed patterning strategy based on controllable elastic modulus was demonstrated to fabricate self-erasable dynamic surface patterns(S-DSPs)that increase information storage density.These novel S-DSPs strategically integrated amino co-oligomers(ACOs)with the 9-anthracenemethanol(9-AM)as skin layers,designing a bilayer multi-encoding system which could carry several different types of information with wrinkled and fluorescent patterns.The ACOs with relatively low molecular weight can endow the elastic modulus of skin layers with a wide range of regulation.As a result,the difference between the compressive strain and the critical wrinkle strain in the bilayer system would be precisely modulated by photo-dimerization to form quick-response(minimum<1 min)and self-erasable(3 min–8 days)wrinkled patterns for S-DSPs.Meanwhile,the fluorescence pattern could be independently erased and reprogrammed without affecting the change in the wrinkle pattern under modulus-controlled conditions.Moreover,controllable self-erasure in S-DSPs significantly develops tamper-proof capabilities in a supply chain.This original strategy could provide a new approach to the tamper-proof,high-density,and multi-encoded information storage in the product security or inkless printing.
文摘辅助驾驶和自动驾驶让汽车变得越来越智能,确保汽车安全驾驶的条件之一是要确保上位机和执行器即汽车电子控制单元(Electronic Control Unit,ECU)间的通信数据不被篡改。基于汽车开放系统架构(AUTomotive Open System ARchitecture,AUTOSAR)的板端加密通信(Security Onboard Communication,SecOC)具有防重放和防篡改的特点,可以有效保护ECU间的通信信息。鉴于此,深入研究了SecOC车内网络安全通信,分析了SecOC每个模块的作用与原理,实现了SecOC车内网络安全通信,将该设计应用于某电动助力转向系统的产品中,并创建了基于控制器局域网(Controller Area Network,CAN)开发环境(CAN Open Environment,CANoe)的SecOC仿真模型。最后,通过测试证明了所提模型的有效性和可靠性。
