Abstract: Embodiments of the present invention provide a portable system and method for accessing data remotely. The system and method include a first module and a second module, each of the modules being associated with the host system, wherein the first module is capable of being connected to the host system and the second module, and the second module is capable of being connected to the remote system to establish a secure communication channel between the first and second modules across the data link to access the data.

Abstract: A method and system for remote access to data stored on a host system from a remote system via a data link, a method and system for storing validation password data on a pair of connected first and second modules, and a method and system for verifying the identity of a first module removed from a pair of initially connected and associated first and second modules.

Abstract: Embodiments of the present invention provide a portable system and method for accessing data remotely. The system and method include a first module and a second module, each of the modules being associated with the host system, wherein the first module is capable of being connected to the host system and the second module, and the second module is capable of being connected to the remote system to establish a secure communication channel between the first and second modules across the data link to access the data.

Abstract: The distribution of security certificate revocation information on a communications network is disclosed. An issuer node (82) of said network periodically generates data representative of base certificate revocation lists (CRLs) (10). The issuer node (82) periodically generates data representative of incremental CRLs (50), the incremental CRL data (50) including attributes for a current list of revoked certificates and a digital signature of the most-recent base CRL (10). A relying node (86) requests current incremental CRL data (50) from the issuer node (82). The relying node (86) reconstructs said most-recent base CRL by iteratively updating the list of revoked certificates present in the previous base CRL data held with the list of revoked certificates held by any intervening incremental CRL data (50). Additional forms of milestone CRL data (60) and augmented CRL data (70) are also disclosed.