US 8,713,327 B1Granted

Circuit for and method of enabling communication of cryptographic data

AssigneeXilinx, Inc.

InventorsEdward S. Peterson, Jason J. Moore

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Abstract

A circuit for enabling communication of cryptographic data in an integrated circuit is disclosed. The circuit comprises a first interface coupled to receive data having a first security level; a second interface coupled to receive data having a second security level; a cryptographic application; and a routing block coupled between the first and second interfaces and the cryptographic application, the routing block comprising configurable logic, wherein the routing block is configurable to selectively route the data having the first security level by way of the first interface and to route data having the second security level by way of the second interface. A method of enabling communication of cryptographic data in an integrated circuit is also disclosed.

Claims17

Dependent claims

A circuit for enabling communication of cryptographic data in a programmable integrated circuit, the circuit comprising:

a first input interface coupled to receive data having a first security level;
a second input interface coupled to receive data having a second security level;
a cryptographic application;
and
a routing block coupled between the first and second input interfaces and a first cryptographic application interface and a second cryptographic application interface of the cryptographic application, the routing block comprising programmable interconnect elements establishing a routing path between the first input interface and the first cryptographic application interface or the second input interface and the second cryptographic application interface,
wherein the routing block is configurable responsive to first configuration bits to selectively route the data having the first security level between the first input interface and the cryptographic application by way of the routing block having a first configuration providing a first path between the first input interface and the first cryptographic application interface, and to route the data having the second security level between the second interface and the cryptographic application by way of the routing block having a second configuration providing a second path between the second input interface and the second cryptographic application interface,
wherein the second configuration is enabled in response to second configuration bits provided in a partial reconfiguration of the integrated circuit if it is determined that the data having the second security level is to be routed by the second input interface, and the first path is eliminated in the second configuration to prevent data from being routed between the first input interface and the first cryptographic application interface while data is being routed from the second input interface to the second cryptographic application interface.

4 more elements

A circuit for enabling communication of cryptographic data in a programmable integrated circuit, the circuit comprising:

a plurality of cryptographic applications, each cryptographic application comprising a first interface receiving data having a first security level and a second interface receiving data having a second security level;
and
a routing block coupled to at least one first interface and at least one second interface of the plurality of cryptographic applications, the routing block comprising a plurality of enable circuits corresponding to the plurality of cryptographic applications,
wherein the routing block is configurable responsive to first configuration bits to selectively route the data having the first security level between the first interface and a cryptographic application by way of the routing block having a first configuration providing a first path between the first interface and a first cryptographic application interface;
and
wherein the enable circuits enable simultaneously coupling the data having a first security level and the data having a second security level to at least one cryptographic application of the plurality of cryptographic applications if it is determined that the data having the second security level is to be routed by the at least one second interface.

3 more elements

A method of enabling communication of cryptographic data in a programmable integrated circuit, the method comprising:

configuring a first portion of programmable resources as a cryptographic application having a first input interface coupled to receive data having a first security level and a second input interface coupled to receive data having a second security level;
configuring a second portion of programmable resources as a routing block coupled to the cryptographic application, the routing block enabling a connection from the first input interface to a first cryptographic application interface of the cryptographic application;
and
transforming the configuration of the second portion of the programmable resources to enable a connection from the second input interface to a second cryptographic application interface of the cryptographic application if it is determined that the data having the second security level is to be routed by the second input interface,
wherein the transformation of the configuration of the second portion is performed in response to configuration bits associated with the second portion of the programmable resources and provided during a partial reconfiguration of the integrated circuit, and
wherein a path of the routing block enabling a connection from the first input interface to the first cryptographic application interface is eliminated in the second configuration to prevent data from being routed between the first input interface and the first cryptographic application interface while data is being routed from the second input interface to the second the cryptographic application interface.

3 more elements

Dependencies are inferred from the claim text.