Chip attack protection

Abstract

A broadcast-centric cellular communication system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. The system constructs an identical paging signal at the plurality of base stations, and controls the base stations to simultaneously transmit the identical paging signal. A mobile station camps on a paging channel that is common to the plurality of base stations, and listens to paging messages being simultaneously broadcast by the plurality of base stations. The mobile station selects a base station having a suitable signal quality, and transmits to the selected base station, a response to a paging message addressed to the mobile station.

Description

Chip attack protection technical field The present invention relates to protecting chips from attacks, and more particularly to protecting chips from attacks through the chip substrate. Background technique By way of introduction, a secure chip is vulnerable to attacks on the physical structure of the chip. In particular, attackers seek to modify circuitry to obtain information stored in the chip and / or to alter the chip's operating characteristics to those in the attacker's favor. The attack is typically in the form of probing, and has recently been modified for focused ion beams (FIB). Ability to interrogate interconnect traces and other circuit elements, or inject signals into them. Circuits can be rerouted, damaged or scrapped. There are many possible attacks depending on physical modification. The most common defense against attacks is the use of shields. Passive shielding is typically effective at preventing observation of circuits and making attacks more time...

AI Technical Summary

Problems solved by technology

In addition, the via holes generally need to be very deep into the chip 10, thereby making the manufacture of the back shield very difficult.

Additionally, the fabrication of vias is generally incompatible with current processing technologies

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