We introduce in this paper cryptographic protocols which use combinatorial group theory. Based on a combinatorial distribution of shares we present secret sharing schemes and cryptosystems using Nielsen transformation...We introduce in this paper cryptographic protocols which use combinatorial group theory. Based on a combinatorial distribution of shares we present secret sharing schemes and cryptosystems using Nielsen transformations. Nielsen transformations are a linear technique to study free groups and general infinite groups. In addition the group of all automorphisms of a free group F, denoted by AUT (F), is generated by a regular Nielsen transformation between two basis of F, and each regular Nielsen transformation between two basis of F defines an automorphism of F.展开更多
目的:利用VLAN技术解决因数据流过大引起的广播风暴问题,提高网络安全。方法:通过虚拟局域网(VirtualLocal Area Network,VLAN),根据网络用户的位置、作用、部门或者网络用户所使用的应用程序和协议进行分组。结果:根据医院的网络配备...目的:利用VLAN技术解决因数据流过大引起的广播风暴问题,提高网络安全。方法:通过虚拟局域网(VirtualLocal Area Network,VLAN),根据网络用户的位置、作用、部门或者网络用户所使用的应用程序和协议进行分组。结果:根据医院的网络配备和应用情况,将局域网划分为16个VLAN,网络的性能得到显著的提高。结论:该方法在提高网络的可管理性和提供较好的安全措施方面有很好的应用前景。展开更多
文摘We introduce in this paper cryptographic protocols which use combinatorial group theory. Based on a combinatorial distribution of shares we present secret sharing schemes and cryptosystems using Nielsen transformations. Nielsen transformations are a linear technique to study free groups and general infinite groups. In addition the group of all automorphisms of a free group F, denoted by AUT (F), is generated by a regular Nielsen transformation between two basis of F, and each regular Nielsen transformation between two basis of F defines an automorphism of F.
文摘目的:利用VLAN技术解决因数据流过大引起的广播风暴问题,提高网络安全。方法:通过虚拟局域网(VirtualLocal Area Network,VLAN),根据网络用户的位置、作用、部门或者网络用户所使用的应用程序和协议进行分组。结果:根据医院的网络配备和应用情况,将局域网划分为16个VLAN,网络的性能得到显著的提高。结论:该方法在提高网络的可管理性和提供较好的安全措施方面有很好的应用前景。
