Methods and systems are provided for supporting efficient and secure “Machine-to-Machine” (M2M) communications using a module, a server, and an application. A module can communicate with the server by accessing the Internet, and the module can include a sensor and/or an actuator. The module, server, and application can utilize public key infrastructure (PKI) such as public keys and private keys. The module can internally derive pairs of private/public keys using cryptographic algorithms and a first set of parameters. A server can authenticate the submission of derived public keys and an associated module identity. The server can use a first server private key and a second set of parameters to (i) send module data to the application and (ii) receive module instructions from the application. The server can use a second server private key and the first set of parameters to communicate with the module.

A system and method for private key management in a public key encryption system are disclosed. In one embodiment, the system and method may utilize a “fake” private key to provide the private key management.

A method for updating a public key is provided. The method includes: acquiring, by a transmitting-end device, a first hash value calculated based on a first current public key; generating a first update public key and a first update private key; generating an update string such that a hash value of a hash function calculated based at least on the first update public key and the update string is equal to the first hash value; calculating, by a receiving-end device, a second hash value based at least on the first update public key and the update string according to the hash function; and verifying the first update public key by comparing the first hash value and the second hash value.

A method of transferring a rights object (RO) and an electronic device are provided. The method includes generating a secure RO by encrypting an RO including usage rights information regarding digital content and transferring the secure RO from a first device to a second device.

Techniques and mechanisms for exchanging encrypted communications wirelessly with an accommodation-capable eye-mountable device (EMD). In an embodiment, a controller of the EMD is configured to encrypt data to be sent from the EMD to an auxiliary device or to decrypt data received by the EMD from the auxiliary device. Cryptographic operations to securely exchange the communications are based on a key value and a vector determined at the EMD. In another embodiment, the auxiliary device operates as a master, and the EMD operates as a slave, at least with respect to enablement of a functionality of the EMD to change an association of a cryptographic key value with a vector.

N key generation circuits are arranged in a pipeline having N stages. Each key generation circuit is configured to generate a round key as a function of a respective input key and a respective round constant. Output signal lines that carry the round key from a key generation circuit in a stage of the pipeline, except the key generation circuit in a last stage of the pipeline, are coupled to the key generation circuit in a successive stage of the pipeline to provide the respective input key.

Providing revocation status of at least one associated credential includes providing a primary credential that is at least initially independent of the associated credential, binding the at least one associated credential to the primary credential, and deeming the at least one associated credential to be revoked if the primary credential is revoked. Providing revocation status of at least one associated credential may also include deeming the at least one associated credential to be not revoked if the primary credential is not revoked. Binding may be independent of the contents of the credentials and may be independent of whether any of the credentials authenticate any other ones of the credentials. The at least one associated credential may be provided on an integrated circuit card (ICC). The ICC may be part of a mobile phone or a smart card.

A method for implementing response function agnostic, challenge-response authentication on a CE device includes sharing a series of proxy responses to a series of authentication challenges with a service provider, receiving an associated actual response from an initialization phase response function for each of the authentication challenges, where at least one of the initialization phase response function and a parameter required for the initialization phase response function is withheld from the service provider, encrypting each of the proxy responses with its associated actual response, thereby generating a series of encrypted proxy responses, storing the encrypted proxy responses on the CE device, receiving one of the authentication challenges from the service provider, inputting the authentication challenge to an operation phase response generator on the CE device, where the operation phase response generator is configured with the same response function used by the initialization phase response generator, and decrypting the proxy response from the encrypted proxy responses and results of the inputting, thereby producing the proxy response to the authentication challenge without sharing the at least one of the response function and a parameter required for the response function with the service provider. Related apparatus and methods are also described.

Approaches for combining different information to be transmitted into different slices of a data packet and/or encrypting the slices using different cryptographic schemes for secure transmission of the information are disclosed. In some implementations, first information and second information may be received. A first data slice representing a portion of the first information may be generated based on a first cryptographic scheme. A second data slice representing a portion of the second information may be generated based on a second cryptographic scheme different than the first cryptographic scheme. A first header may be generated such that the first header may specify the first cryptographic scheme for the first data slice and the second cryptographic scheme for the second data slice. A first data packet may be generated such that the first data packet may include the first header, the first data slice, and the second data slice.

A device and method are provided for establishing a session key between two entities of a communication network that may be highly heterogeneous in terms of resources. The method, based on the Diffie-Hellman (DH) algorithm, provides for the delegation to assistant nodes of the network of the cryptographic operations required for the computations of the DH public value and of the DH session key for the node which is constrained in terms of resources.