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3 Hardware Trojans in Electronic Devices
Fig. 3.15 Invisible phone
First of all, let’s point out the presence of non-standard options—mechanical
sound control (microphone on/off button) and the case integrity control (hidden
alarm prevents attempts of physical penetration into the phone).
There are also options such as means of accessing other networks (cable modem,
analog/digital modem, radio modem, satellite terminal, or GSM modem).
Such phone operates in four ranges (850, 900, 1800, and 1900 MHz). The principal features are the subscriber encryption principle, speech compression algorithm
ACELP 4800 bps, and high quality of speech; the encryption algorithm conforms to
the GOST 28147 standard dated 1989. Due to the use of complete encryption, cryptographic synchronization is required; therefore, before talking, it is necessary to wait
for 10 s in order for connection to be established. The phone has a corresponding
FSB certificate.
The button for activation of the crypto mode is installed on the side of the body.
Guaranteed talk time in the secure mode is 4 h, in the open mode—4.5 h; this
difference is explained by the fact that the embedded script processor activates in the
secure mode.
Phones that implement this additional encryption can work both with Russian
national operators (MTS, Megafon) and (if you’re a traveler) with international ones:
850/1900 in Latin America and 900/1800 in Europe and Asia. Operation of the phone
in international networks requires not only roaming, but also support of the BS26T
data transmission service by the operator. The crypto button helps switch the phone
either into the encryption mode or into the working mode, in which you can call a
regular phone and talk to your friends, your family, etc (Fig. 3.16).
Let us consider certain features of the encryption method used in this phone.
3 Hardware Trojans in Electronic Devices
Fig. 3.15 Invisible phone
First of all, let’s point out the presence of non-standard options—mechanical
sound control (microphone on/off button) and the case integrity control (hidden
alarm prevents attempts of physical penetration into the phone).
There are also options such as means of accessing other networks (cable modem,
analog/digital modem, radio modem, satellite terminal, or GSM modem).
Such phone operates in four ranges (850, 900, 1800, and 1900 MHz). The principal features are the subscriber encryption principle, speech compression algorithm
ACELP 4800 bps, and high quality of speech; the encryption algorithm conforms to
the GOST 28147 standard dated 1989. Due to the use of complete encryption, cryptographic synchronization is required; therefore, before talking, it is necessary to wait
for 10 s in order for connection to be established. The phone has a corresponding
FSB certificate.
The button for activation of the crypto mode is installed on the side of the body.
Guaranteed talk time in the secure mode is 4 h, in the open mode—4.5 h; this
difference is explained by the fact that the embedded script processor activates in the
secure mode.
Phones that implement this additional encryption can work both with Russian
national operators (MTS, Megafon) and (if you’re a traveler) with international ones:
850/1900 in Latin America and 900/1800 in Europe and Asia. Operation of the phone
in international networks requires not only roaming, but also support of the BS26T
data transmission service by the operator. The crypto button helps switch the phone
either into the encryption mode or into the working mode, in which you can call a
regular phone and talk to your friends, your family, etc (Fig. 3.16).
Let us consider certain features of the encryption method used in this phone.