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SIGINT. Signal Intelligence Solutions

MainCatalogCellular interceptionDecryptor A5.1

Decryptor A5.1 for calculating keys with passive and active interceptors

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Decryptor A5.1 in a standard case
Decryptor A5.1 in a standard case
  • Decryptor A5.1 in a standard case
  • Decryptor A5.1 in 1U case
Main characteristics
SKU 2200
Vendor Intercept
Category Cellular interception
Standart 2G - WiFi
System output Voice, SMS and call related data
Power source 115/230V AC, 12/24V DC, 250W
Features up to 80 keys per sec
OS SDK for Win and Linux
Decryption A5.1
SMS(MMS) in all languages
Connectors Ethernet, Internet
Management API, IP
Delivery set Decipherer unit, Software
Dimensions, HWD 330 x 268 x 80 mm
Weight 4 kg
Shipment Worldwide

The Decrypt Unit (Deciphering Network Multi-processor Unit) - this is a real-time information system, that is designed to calculate the A.5/1 session encryption key of any active, passive and hybrid GSM network monitoring systems (interception systems).

The module can simultaneously serve several GSM network monitoring systems. The connection is made directly to the monitoring system or via the Internet, while the Decryption Unit can be located remotely.

The A5.1 coding is a stream cipher which is used to provide over-the-air (OTA) communication privacy in the GSM cellular standard. As the result, all OTA data is covered by the session key KC. Upon discovering the KC, an entire GSM session can be restored with voice, SMS recording, etc. 

The hardware is controlled by a computer which is responsible for the deciphering configuration and the communication between the A5.1 Deciphering unit and GSM monitoring system. 

The A5.1 Deciphering unit is a network device and can be connected to the operator’s computer either directly by LAN cable or wirelessly using any available communication (GPRS, UMTS, satellite link, etc.) or via highly secured Internet VPN connection. 

The special software for A5.1 Deciphering unit can maintain more than one GSM system according to a present priority. It is a typical server-client application. Usually, the A5.1 Deciphering unit is located in a customer’s head quarter and is connected with GSM monitoring systems via Internet or Intranet. 

Pooling resources

red1.jpg One deciphering unit can serve several GSM monitoring systems with priority tuning.
red1.jpg Several deciphering units can be used with one GSM monitoring system at the same time.

Specification

Handling of parallel evaluationup to 80 K/C
Minimum deciphering time0.01 sec
Average deciphering time (for probability > 98%)   0.5 sec
Connection with GSM SystemEthernet, Internet
Operating temperature range+5° to +25° C
Storage temperature range-20° to +60° C
Humidity+40° C at 95%
Power supply12/24/220V
Power consumptionup to 250W
Dimensions330 x 268 x 80 mm
Weight4 kg
















File Title Release Date File Type Size (mb) Action
End User Certificate (EUC) to apply for purchase 03-03-2021 Documentation (pdf) 0.09 MB download

To access this product file, get partner STE status


Modes of working with monitoring systems (interception systems)

1) The Decryption Unit receives raw data from monitoring systems (RAW data - burst GSM) from each UE:


Active sys
tem GSM


Passive system GSM

UP-link

UE channel

Down-link

BTS channel


Logical channels 
SACCH / SDCCH


Predictor Up/Down-link

structurally organized system, the function of which is to predict possible combinations-patterns (Pattern) to calculate the session key based on the received gamma


Extended statistics system:

by operators or by session


2) The Decryption module receives pre-prepared data, already formed gamma (Gamma) from monitoring systems


Specification

Decryption Unit may be provided as standalone device or integrated within monitoring system, features and forms depends on integration type and order configuration


Compound


Computer-based (mini-ITX platform)

Possible dimensions (by agreement with the customer, it is possible to develop any case and appearance, taking into account the presented dimensions, as well as to integrate into existing solutions)

Case dimensions:

44õ430õ250 (1U server)

General size:

44x485õ290 (1U server)
Or other form factors

Weight

4 kg

Key calculation speed (for BER < 0.2%)

up to 80 keys per second

Key area coverage

~ 90%

Control-Management (API)

feature set for software development (SDK for Win and Linux)

Type of connection acc. to customer's choice

Ethernet/Wi-Fi

Pairing capability

active, passive and hybrid GSM network monitoring systems (interception systems)

Power consumption

up to 250 W

Working voltage (Ordering options)

12/24/220V

Possibility of remote connection via IP

VPN

Ambient temperature

0Ñ˚ - 50Ñ˚


File Title Release Date File Type Size (mb) Action
End User Certificate (EUC) to apply for purchase 03-03-2021 Documentation (pdf) 0.09 MB download

To access this product file, get partner STE status


Main advantages of Key Decryptor A5.1
:

1. Integration with any existing active, passive and hybrid monitoring systems;

2. Integration into already developed systems - any appearance under any brand logo;

3. Open architecture for management - API;

4. Own software development, which makes it possible to make any changes during integration;

5. Own tables to cover the key area;

6. Various operating modes with advanced system of statistics and data forecasting;

7. Various hardware configuration solutions.


Distinctive features from existing analogues:

1. The Decryptor A5.1 is designed on the basis of available hardware components for mass production in any place;

2. The system is a structurally organized system with the function of forecasting possible initial data and statistics;

3. The system contains functions for software development - API;

4. The system allows you to serve simultaneously various active and passive monitoring systems;

5. The system allows you to identify the features of configuring the GSM network using A5 / 3 encryption to support monitoring systems.

File Title Release Date File Type Size (mb) Action
End User Certificate (EUC) to apply for purchase 03-03-2021 Documentation (pdf) 0.09 MB download

To access this product file, get partner STE status


red1.jpg Demo or training of interception systems are carried out in our premises or in the client's country, subject to an official invitation from government agencies.

red1.jpg We provide online demos only to existing clients with whom we have successful experience of cooperation.

red1.jpg We do not provide free training. If you are not familiar with the subject, links to training courses are here.

red1.jpg To apply for a demo or training you should provide complete end user certificate

File Title Release Date File Type Size (mb) Action
End User Certificate (EUC) to apply for purchase 03-03-2021 Documentation (pdf) 0.09 MB download

To access this product file, get partner STE status

File Title Release Date File Type Size (mb) Action
End User Certificate (EUC) to apply for purchase 03-03-2021 Documentation (pdf) 0.09 MB download

To access this product file, get partner STE status

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