Abstract: The authentication of a device with a server over a network includes authenticating, by the device, the server so as to establish a secure connection with the server. The device communicates identification information of the device to the server, wherein the identification information uniquely identifies the device to the server. The server determines the credibility of the device using the identification information communicated by the device. In a case where the server determines that the device is credible, the server creates a first authentication token for the device, stores the first authentication token, and transfers the first authentication token to the device using the secure connection, and the device stores the first authentication token. The server authenticates the device using the first authentication token.

Abstract: The authentication of a device with a server over a network includes authenticating, by the device, the server so as to establish a secure connection with the server. The device communicates identification information of the device to the server, wherein the identification information uniquely identifies the device to the server. The server determines the credibility of the device using the identification information communicated by the device. In a case where the server determines that the device is credible, the server creates a first authentication token for the device, stores the first authentication token, and transfers the first authentication token to the device using the secure connection, and the device stores the first authentication token. The server authenticates the device using the first authentication token.

Abstract: The invention provides for installing encryption keys on a device not having any previous security credentials. An installation authority generates a security token to be used by the device for secure communications, and an installation credential for the device, and stores them in association with one another. A user of the device is provided with the installation credential, whereby the user inputs the installation credential into the device. The device utilizes the installation credential as a temporary security key, establishes a secure communication channel with the installation authority and requests provision of the security token. The installation authority provides the security token associated with the installation credential to the device over the established secure communication channel, and the device installs the security token, after which the device erases the installation credential from the device.

Abstract: Security against replay of a message by generating a list of unique message enabling codes (TATs) in a first device and storing the list in a second device. A message generated in the first device, which includes at least one of the unique message enabling codes from the list, is transmitted to the second device. The unique message enabling code of the received message is compared with the list stored in the second device to determine whether or not to enable processing of the message by the second device. If the unique message enabling code received with the message is included in the stored list, processing of the message is enabled and, the corresponding unique message enabling code is deleted from the stored list. If the unique message enabling code received with the message is not included in the stored list, processing of the message is rejected.

Abstract: A file format for a secure file for use with a block cipher or a stream cipher, the secure file having a secure client header and a data block appended to the secure client header. The client header has a client information block comprised of a public information block, a private information block and an initialization vector. At least a portion of the private information block is encrypted, and a client information block integrity check value is appended to the client information block, the client information block integrity check value being obtained by performing an integrity check on the client information block. The data block is preferably encrypted and is comprised of a plurality of encrypted data blocks each appended with its own respective integrity check result value.