Apparatus for Protection of Electronic Circuitry and Associated Methods
AssigneeSilicon Laboratories Inc.
InventorJavier Elenes
Life of this patent
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Abstract
A method of providing access to a resource in an integrated circuit (IC) includes determining whether an attempt is made to access the resource. The method also includes determining whether a count of attempts to access the resource equals a maximum count. The method further includes authenticating cryptographically a command for accessing the resource if the count of attempts to access the resource is less than the maximum count.
Claims20
A method of providing access to a resource in an integrated circuit (IC), the method comprising:
- determining whether an attempt is made to access the resource;
- determining whether a count of attempts to access the resource equals a maximum count;
- and
- authenticating cryptographically a command for accessing the resource if the count of attempts to access the resource is less than the maximum count.
A method of providing access to a resource in an integrated circuit (IC), the method comprising:
- determining whether an attempt is made to access the resource;
- waiting for a duration of time, wherein the duration of time is zero for a first attempt to access the resource;
- authenticating cryptographically a command for accessing the resource;
- and
- selectively allowing access to the resource if authenticating cryptographically the command indicates that the command is valid.
An integrated circuit (IC), comprising:
- a protection circuit to provide countermeasures against an attempt to access a resource in the IC, the protection circuit comprising a controller to selectively provide access to the resource in the IC by authenticating a command by (a) determining whether a count of attempts exceeds a maximum count;
- or (b) inserting a wait state before authenticating the command.
Dependencies are inferred from the claim text.