A method for performing initial registration is provided. The method includes receiving a server timeout message, the server timeout message including at least a field set to a value equal to a value received during a first registration. The method further includes initiating restoration procedures by performing an initial registration.

The techniques described herein may provide an efficient and secure two-party distributed signing protocol, for example, for the IEEE P1363 standard. For example, in an embodiment, method may comprise generating, at a key generation center, a first partial private cryptographic key for a user ID and a second partial private cryptographic key for the user ID, transmitting the first partial private cryptographic key to a first other device, transmitting the second partial private cryptographic key to a second other device, and generating a distributed cryptographic signature for a message using the first partial private cryptographic key and the second partial private cryptographic key.

In a method for conducting communications, a first terminal device in a vehicle-to-vehicle (V2V) network sends a first request message to a server of the V2V network to request the server to allocate an encryption key corresponding to a first service. The first request message includes an identifier of the first service and an identifier of the first terminal device. The first terminal device receives from the server a first response message that includes an encryption key corresponding to the first service. The first terminal device uses the encryption key to encrypt first information related to the first terminal device in the V2V network, and broadcasts a broadcast message that includes the encrypted first information to the V2V network.

The disclosed embodiments are related to securely updating a semiconductor device and in particular to a key management system. In one embodiment, a method is disclosed comprising storing a plurality of activation codes, each of the activation codes associated with a respective unique identifier (UID) of semiconductor device; receiving, over a network, a request to generate a new storage root key (SRK), the request including a response code and a requested UID; identifying a selected activation code from the plurality of activation codes based on the requested UID; generating the SHRSRK value using the response code and the selected activation code; associating the SHRSRK value with the requested UID and storing the SHRSRK value; and returning an acknowledgement in response to the request.

A key management method serves as an electronic control unit (ECU) in an onboard network system having a plurality of ECUs that perform communication by frames via a network. The method includes storing a shared key and executing encryption processing based on the shared key. The method further includes executing inspection of a security state of the shared key stored in a case where a vehicle is in at least one of the following particular states: the vehicle is not driving and is an accessory-on state; a fuel cap of the vehicle is open, and the vehicle is not driving and is fueling; the vehicle is parked, which is indicated by the gearshift; the vehicle is in a stopped state before driving, which is indicated by the gearshift; and a charging plug is connected to the vehicle, and the vehicle is electrically charging.

A cryptographic key management service receives a request, associated with a principal, to use a cryptographic key to perform a cryptographic operation. In response to the request, the service determines whether a rate limit specific to the principal is associated with the cryptographic key. If the rate limit is associated with the cryptographic key, the service generates a response to the request that conforms to the rate limit. The service provides the response in response to the request.

A method and system for encrypted messaging includes first and second client devices and a quantum key device having a quantum random number generator. The generator provides a first quantum random signal, and the key device provides a symmetric first master key from the first quantum random signal. The master key is transmitted to the first client device and stored. The key device uses the master key to generate an encrypted package by encrypting one of a plurality of keys. The key device generates a second encrypted package. The first pairing key is provided to the first client device by decrypting the first encrypted package using the first master key and providing the first pairing key in the second client device by decrypting the second encrypted package using the second master key to establish an encrypted connection between the first and second client devices.

A method for managing keys and encrypting data is provided. The method includes receiving data to be written to a logical disk, generating an encryption table indicating one or more locations on the logical disk for storing the data and indicating a key used for encrypting the data, encrypting the data to be written to the logical disk, and transmitting the encrypted data and the encryption table to a storage array.

Systems and methods provide a transient component limited access to data in a composition. One method includes receiving a request for the transient component to access data in the composition. The composition may include permanent components operable to utilize encryption keys generated at selected intervals from a seed value shared by the permanent components. The encryption keys utilized by the permanent components at each selected interval may be identical to one another. The method also includes generating a set of encryption keys from the seed value for a specified period of time. The set of encryption keys may be identical to the encryption keys to be utilized by the permanent components at the selected intervals to occur during the specified period of time. The method further includes granting the transient component access to data in the composition for the specified period of time via the set of encryption keys.

A system uses a keyboard application to encrypt and decrypt e-mail, messages, and other digital data. By using quantum random number generators, the system has improved data security. Using a quantum random number, an agent (at a sender side) generates an encryption key which is used to automatically encrypt a message. The encryption key is stored at a key server. The encrypted message will be sent by an application using its standard transmission means such as SMTP, SMS, and others. The encrypted message can be automatically unencrypted by using an agent (at a recipient side) and retrieving the key from the key server. The system also provides an optional double encryption, where the message is encrypted with a user-generated password before being encrypted using the encryption key.