EMTCG176-3G Datasheet, PDF (2/3 Pages) EM Microelectronic - MARIN SA – 176KB Flash Smart Card IC + Cryptography Engine

Introduction
EMTCG176-3G is a member of the Theseus family of
devices designed specifically for smart card
applications. It is software compatible with the industry
standard 8051 micro-controller, to guarantee the
maximum availability of qualified software. The
hardware implementation of the core is a modern design
not relying on microcode, with an increase of up to 4
times on a standard 8051's clocks per instruction.
Security of the family of devices makes them particularly
suitable in electronic commerce and sensitive data
areas. This is accomplished in hardware, with not only
protection against out of parameter operation of the
device, but hardware memory management to protect
against software security attacks. The CPU clock is
derived from its own internal oscillator, so preventing
attacks by clock manipulation, or extrapolating program
execution by monitoring current variations on clock
edges.
The need to support the emerging multifunction cards
requires that the device under software control can
download an application and run it when the device is in
the field embedded in a plastic card. This application
can be in the form of a script to be executed by an
interpreter or as a raw binary directly executed by the
processor. The device has to be protected against the
downloading of attack software designed to corrupt or
uncover the working or data contained in the device.
Traditionally this has been a software function, which
relies on the total integrity of the embedded software.
The EMTCG176-3G implements the first level of
protection in hardware. This maximises the security of
the device, and allows the reusability of developed
certified code, by isolating it from the actual hardware
implementation of the device. This protection
mechanism allows for a Secure Operating System to be
embedded into the device at manufacture, which has
access rights to features of the device that are denied to
applications that can be loaded into the device at
manufacture or in the field.
With up to a 179KB (RAM+GPNVM512+EEPROM) of
on chip memories EMTCG176-3G provides highly
flexible memory partitioning between code and data. So
called GPNVM512 standing for General Purpose
Memory could be efficiently used to host data or code.
Its 512 bytes page size offers very compact memory
usable as well for code and data storage.
The Secure Operating System allocates to each
application programme, areas of the memory resources
of the device. The hardware then ensures that when the
application code is executing only accesses to these
designated spaces are made.
An extension of application mode has been developed
to facilitate Java Card virtual machine integration.
In systems where application isolation is not needed, the
security mechanism acts as a general protection unit
trapping software errors.
Theseus^TM Cipher Gold 176-3G
EMTCG176-3G
Serial interface
EMTCG176-3G offers a unique serial interface
compliant with the ISO 7816-3 specification with several
modes implemented allowing serial connections at 9600
up to 357K bits per second at 3.57MHz. EMTCG176-3G
supports T=0 asynchronous half duplex character
transmission protocol, T=1 asynchronous half duplex
block transmission and a proprietary T=14 protocol used
for fast loading of Code into the OTP by the card
manufacturer. It handles minimum guard time
requirements between characters specified by ISO7816-
3 specification automatically. EMTCG176-3G is
designed to be compatible with the ISO7816-3
specification defining the characteristics of Integrated
Circuit Cards commonly referred to as smart cards.
DES/TDES
High performance symmetric encryption / decryption
algorithm can be achieved using DES and Triple DES
on chip HW Accelerator, this engine could be used as
well in EBC and CBC modes. The intrinsic security of
this DES implementation can be reinforced using
SPA/DPA protection mechanisms to achieve very high
level of security.
Random Number Generator
The on chip random number generator is fully Fips140-2
compliant, providing a rapid stream of truly random
numbers. This allows use of the random numbers
generated beyond just the provision of numbers for
randomising transmissions or generating keys.
Clocks
EMTCG176-3G has its own internal oscillator this allows
the core of the device to be independent of the external
clock. The processor can also be clocked much faster
than the IO CLK signal. This ensures the elimination of
fraudulent attacks involving frequency jitter and unequal
mark space ratios. The internal clock generator is
connected to the core via a divider that is under the
control of the software. This allows the Operating
System writer to control the trade off between execution
speed and power drawn by the device. Extending
battery life in hand help applications where slow
interfaces are involved.
Anti tampering
The EMTCG176-3G has extensive anti tampering
provision including the monitoring of the connection to
the device to ensure that deviations beyond a
prescribed criteria result in the device being closed
down before its operating conditions are violated.
On chip voltage regulators
Several on chip regulators isolate the various elements
of the device from variations and fluctuations in the
supply voltage. This allows elements to be characterised
precisely, as they operate at one fixed voltage, which in
turn maximises the endurance of the device.
Technology
This product is using superior Flash memory SuperFlash
Technology licensed from SST. SuperFlash is a
registered trademark of SST (Silicon Storage
Technology Inc.).
Copyright © 2005, EM Microelectronic-Marin SA
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