Abstract: The present disclosure generally relates to systems and methods for utilization of network mitigation techniques in the form of null address routing to mitigate coordinated DDOS attacks. One or more computing devices can install malware code into a network device after exploiting a vulnerability of the network device. A monitoring and mitigation service can monitor network devices and detect malware code installed on the network-based service. The monitoring and mitigation service can identify the internet protocol (IP) address or any routing information regarding the computing devices that sent the malware code. Based on the identified information, the monitoring and mitigation service can identify and implement the network mitigation information in the form of null routing addresses that will cause network communications associated with the identified computing device to be terminated or otherwise not delivered to the intended network-based resources.

Abstract: The present disclosure generally relates to systems and methods for utilization of network mitigation techniques in the form of null address routing to mitigate coordinated DDOS attacks. A monitoring and mitigation service can characterize a command and control node as compromised or otherwise manipulated for purposes of generating distributed attacks. The monitoring and mitigation service can then identify network mitigation information in the form of null routing addresses that will cause network communications associated with the identified command and control node to be terminated or otherwise not delivered to the intended network-based resources. The monitoring and mitigation service can propagate the null routing address to routing components. The network mitigation information can be associated with expiration criteria for the routing components that receive and implement the network mitigation technique.

Abstract: A method of encrypting a digital file composed of a sequence of bytes, each byte defined by a relative position within the digital file and a value, the method comprising: using an encryption key to encode the relative position separately from the value of each byte; and producing an encrypted digital file in which the correlation between relative position and value of each byte in the original digital file is concealed in the encrypted digital file.

Abstract: A method of encrypting a digital file composed of a sequence of bytes, each byte defined by a relative position within the digital file and a value, the method comprising: using an encryption key to encode the relative position separately from the value of each byte; and producing an encrypted digital file in which the correlation between relative position and value of each byte in the original digital file is concealed in the encrypted digital file.

Abstract: A telecommunication terminal contains a two direction light beam scanner (140, 142, 144) for emitting a deflected light beam from the telecommunication terminal. A control circuit (16) activates the light beam scanner (140, 142, 144) to successively deflect the light beam in directions according to a two-dimensional direction pattern of deflections defining an image dependent on programmable control information, in response to detection 5 of a telecommunication signal by the reception circuit (12). In an embodiment at least part of the direction pattern is selected dependent on a content of a ring-tone signal.