A private key is held which conforms to an ElGamal encryption system on a semigroup, calculation of an order of an element of the semigroup being computationally difficult, information corresponding to ciphertext conforming to the ElGamal encryption system is input, a private key s is used to decrypt the information corresponding to the ciphertext in conformance to the ElGamal encryption system, and information corresponding to a result of decrypting the ciphertext is obtained and output. Alternatively, whether it is computationally difficult or easy to calculate the order of the element of the semigroup is determined, and the safety of a decryption service providing device is evaluated based on the determination result.

A security policy management solution (such as a Data Loss Prevention (DLP) system) is augmented to enable a user to model and visualize how changes in a security policy may impact (positively or negatively) the effectiveness of a policy configuration as well as the risk associated with its deployment. This technique enables a user (e.g., a security policy administrator) to evolve enterprise information technology (IT) security policies and, in particular, to generate and display “what-if” scenarios by which the user can determine trade-offs between, on the one hand, the effectiveness of a proposed change to a policy, and on the other hand, the risk associated with the proposed change.

In general, one aspect of the subject matter described in this specification can be embodied in methods that include receiving a registration request from a mobile device to create a credential management account for a user associated with the mobile device; generating a public key and a paired private key associated with the credential management account; transmitting a certificate signing request to a certificate authority system; receiving a digital certificate from the certificate authority system; receiving a request to retrieve a credential for the user from a credential issuing organization; transmitting a request for the credential for the user to the credential issuing organization system; receiving, from the credential issuing organization; transmitting the decrypted data to the credential issuing organization; receiving data for the credential for the user from the credential issuing organization system; and transmitting data encoding a portion of a badge representing the credential.

In a computing device a domain name system (DNS) query is generated and sent, and a check is made as to whether a verified DNS response to the DNS query is received. The computing device is determined to be inside a particular network if a verified DNS response is received, and is determined to be outside that particular network if a verified DNS response is not received. A DNS response can be determined to be verified if both the DNS response has an expected value and the DNS response is digitally signed by a trusted authority, and otherwise can be determined to be not verified.

A virus detecting method and device are provided, where the method includes that the virus detecting device receives a network data stream carrying a portable execute (PE) file; calculates first identification information according to structure information of the PE file; matches the first identification information with virus identification information prestored in an antivirus database, and determines whether the PE file is an Archive file; if the PE file is an Archive file, calculates second identification information according to a data packet that carries a data part of the Archive file; and matches the second identification information with the virus identification information prestored in the antivirus database, and if the matching succeeds, determines that the Archive file is an Archive virus file. The present invention can effectively determine whether an Archive-type PE file is a virus file.

Methods and apparatus for providing access to content across a plurality of devices and environments. In one embodiment, a downloadable rights profile is utilized in order for a user device to determine whether to provide content to a subscriber. The user device is first registered to content delivery the network; the device then requests a rights profile indicating the rights of the subscriber associated with the device to access content. The rights profile is transmitted to the device. The rights profile may be configured to be valid only for a pre-determined time, thus enabling a subscriber's rights to be updated (including revoked). Security mechanisms may also be utilized to ensure access to content is limited only to authorized subscribers. In another embodiment, a user-based authentication procedure is utilized, thereby making the rights determination and content provision process completely agnostic to the underlying hardware.

Novel solutions for detecting and/or treating malware on a subscriber's premise network. Such solutions can include, but are not limited to, tools and techniques that can detect, and/or enable the detection of, malware infections on individual subscriber devices within the subscriber's network. In a particular embodiment, for example, a premise gateway, or other device on the subscriber's premise network, is configured to analyze packets traveling through the premise gateway and, based on that analysis, identify one or more subscriber devices that are infected with malware.

The invention provides a security system and method for use in a communications network, said network comprising means to allow a plurality of devices to communicate over the network wherein at least one device is a machine to machine (M2M) operated device and at least one other device is a human operated device, said security system comprising: means to capture data traffic originating from the plurality of devices on the network; means for analysing the data traffic; and means for identifying at least one of the M2M operated devices on the network wherein the system is configured to dynamically adapt to different data traffic patterns on the network.

The present disclosure relates to a method and system for the remote provisioning of an access subscription of a user to a wireless communication network, wherein at least one network operator provides communication services to mobile communication devices provided with a user UICC card. Data of a temporary subscription are generated from the data of an initial subscription which will subsequently allow generating data of a definitive subscription in a network operator and in the UICC card requesting a subscription from the former without the need of remotely transmitting sensitive data of the definitive subscription.

The present invention discloses a system and method for controlling mutual access of smart devices. The method includes creating a home account on a cloud server, and adding smart devices and device information corresponding to the smart devices to a device list under the home account; acquiring, for each of the smart devices, authentication by using the home account and device information corresponding to the smart device; and establishing, for each of the smart devices, a Transmission Control Protocol (TCP) long connection to the cloud server. In the present invention, a unique home account is created on a cloud server, so that smart devices log in to the cloud server by using the unified home account, and the smart devices under the unified home account allow mutual access when being authorized. Therefore, when smart devices in a home access each other, the workload is greatly reduced. Moreover, a permission management module is established on the cloud server, which limits permissions of sending messages between smart devices under a same home account or different home accounts, thereby improving the reliability and security of mutual access of the smart devices.