Cryptech-3G User
Contents
1. the password will not be required In this section you can also enable disable authentication on the encrypted call history and contacts Do not forget your authentication user password because without it Cryptech cant be launched and you will need to contact Casper Technology for software replacement restore For security reasons we recommend not to enable Bluetooth and GPRS connections including those used to send receive MMS Also avoid installing or running applications other than those provided with the device In order to keep the encryption software working it s necessary never to perform the hard reset operation which takes the phone back to its initial state and removes every application installed on the device 11 Static shared keys customization Static cryptographic keys are shared by all the devices used to talk in encrypted mode with each other and are used to encrypt the whole conversation They are often called symmetrical or shared because they must be identical for both interlocutors Click Menu then Options and finally Encryption Keys Create at least one cryptographic key by selecting New then typing 1 in the Priority level field and your password in the field below To enter a key you can choose between text mode default and Hex mode Most users can simply use the Text mode type the encryption keys by using all available characters Hex mode mode is inc2. key will appear on the bottom of the screen 9 UMTS EDGE GPRS WIFI networks Cryptech 3G stato progettato per poter utilizzare qualunque rete di comunicazione internet disponibile sul telefono E importante configurare prima di tutto le impostazioni per la rete umts in modo che si possa essere sempre raggiungibili Quando si in vicinanza di router wifi ad esempio in ufficio o in un hotspot pubblico basta accendere sul telefono il wifi configurare eventualmente la chiave di accesso ed utilizzare Cryptech 3G su tale rete In questo modo il traffico generato non influira sulla bolletta telefonica Si possono avere anche pi connessioni attive umts e wifi in tal caso il telefono fara automaticamente passare il traffico sul wifi e torner ar utilizzare l umts appena il wifi non pi disponibile Cryptech 3G si pu utilizzare anche in movimento ma in tal caso ci possono essere dei problemi di trasmissione relativi all HANG OVER tra una cella e laltra questi problemi si manifestano come dei buchi nella comunicazione o dei ritardi nella trasmissione che vengono recuperati non appena possibile La qualita dell audio e del ritardo si adattano continuamente ed in tempo reale in relazione alle prestazioni della rete Se ci si trova in una zona con copertura GPRS o EDGE la qualita sara leggermente inferiore dovendosi adattare alla banda disponibile ed il ritardo sara superiore per poter rendere la conversazione fluida nonostante l irregolari
3. risk of human negligence However several options are available to provide maximum flexibility of usage By default Cryptech is pre configured for highest security i e combination of static and dynamic keys required However the Security Levels can be managed select Menu gt Options gt Security Intellectual Property of Casper Technology s r l all trademarks are property of their respective owners Operations and Sales Office Via Cardinal Massaia 83 10147 Torino TO Italy Tel 390112303634 Fax 3901 12303632 Web http www caspertech com Email info caspertech com CASPERTECH ia TRUST IN COMMU CRYPTECH 3G USER MANUAL 1 Shared Keys You can select if a shared key can be optional or required This way is possible to prevent communicating with Easy Cryptech devices that do not have shared keys or other Cryptech that do not have a key in common 2 Diffie Hellman You can choose whether it will be optional required or disabled This way you can force the use of keys generated at the moment combined with static keys or exclude the use of Diffie Hellman in order to have more control over the key used for encryption 3 Diffie Hellman protocol generates keys with calculations based on 571 bits elliptic curves ECDH if you remove the tick in this function the system will use the standard Diffie Hellman algorithm thus generating keys derived by 4096 bits prime numbers In this case the generation is slower and less robu
4. CASPERTECH i CRYPTECH 3G USER MANUAL 1 System requirements In order to make encrypted phone calls please make sure the data channel UMTS is enabled and configured for your SIM card check with your telephone operator Make sure you have a contract suitable for data transmission 2 Starting the application The Cryptech application starts automatically along with the device The Cryptech home screen will appear on the display If the application is idle for too long it will be sent to the background by the Windows Mobile Operating System i e you will not be able to see the application home screen on the device To reactivate simply select Menu from the Windows Mobile Home Screen and click on the Cryptech icon which appears on the display 3 VoIP account setup To connect to the VoIP network and be available you will first have to set the username usually the phone number with country code and the password for your account To do this simply press Menu gt VoIP gt Settings If you use Cryptech 3G rarely or only at certain times of the day and for the remaining time you do not wish to be available we recommend to remove the tick from Connect at startup also if you do not want the system to automatically connect when you start your phone consuming battery and data traffic 4 Voip server connection To be able to call or be reachable in crypto mode Cryptech 3G must be connected to the VoIP server If the system is set to Con
5. eal time in relation to network performance If you are in an area with EDGE or GPRS coverage the quality will be slightly lower since the system will have to adapt to the available bandwidth and the delay will be higher in order to make the conversation flow linear despite the irregularity of the transmission In particular the transition from one GPRS cell to a UMTS and vice versa can create an audio gap of several seconds 10 User Authentication Password Setting The user authentication password is used both to control access to the Cryptech application and to the storage area of the cryptographic keys which make your conversations secure Per impostare la password di autenticazione utente selezionare dalla schermata Cryptech la voce Menu gt Opzioni gt Password Utente Verra richiesto di inserire la password due volte quindi cliccare su Fatto To set the user authentication password from the Cryptech home screen select Menu gt Options gt User Password You will be prompted for the password twice then click on Done To set the password for user authentication screen select Menu gt Options gt User Password You will be prompted for the password twice then click on Done Now you can set the device so that it will promt for a password at each book by selecting Menu gt Options gt Authentication Mode In this window you can choose between always password authentication will be asked each time you start Cryptech or device and never
6. ion Mode 13 Call History Cryptech keeps track of calls made in crypto mode Access to this list is password protected which may be disabled if you wish The list is encrypted to protect privacy 14 Encryption modes management The Cryptech application supports two types of encryption keys static shared keys and dynamic based on the Diffie Hellman protocol keys Unlike static keys the Diffie Hellman protocol does not require user intervention if you enable this feature a dynamic key is created at the beginning of the call and deleted when this is terminated Both encryption with static shared keys and with dynamic keys guarantee absolute security however in both cases there is a human factor to consider Static keys must be shared by all interlocutors and if their number is large there is a certain risk that somebody inadvertedly discloses some keys In the Diffie Hellman protocol there is the remote possibility of an intruder messing with the dynamic key creation during the initial synchronization this is called man in the middle attack Cryptech protects you from this risk by generating numerical authentication codes that appear on your screen during the call Both interlocutors should communicate these codes to each other by voice if they match no intruder has interfered with the call Since users may forget this additional protection Cryptech can also use a combination of both static and dynamic keys that eliminates even the
7. luded for users of a certain experience and requires that the characters inserted as the encryption key are part of the hexadecimal encoding 0 9 A F Notice that the keys chosen in this section are used to encrypt the conversations whereas the user authentication password is used to grant access to Cryptech and to protect manage the encryption keys storage The value 1 means highest priority and is required in order to bypass the Cryptech test keys Once you have successfully inserted your key s you can delete the Cryptech test keys with the Delete Key function click on each key select Menu then Manage Key and Delete Key Remember to set the same static shared keys on every device you want to communicate with or consider using the Diffie Hellman protocol to call in encrypted mode without sharing common keys 12 Encrypted Contacts Cryptech keeps you encrypted contacts apart from the normal phone book to facilitate crypto calls messages and especially to protect the privacy of contacts To access the contacts you need to enter the password for authentication To create a contact number you can either type it by hand or import contacts from Microsoft on the phone Alternatively the system automatically creates the contact upon receiving or making encrypted calls with a contact If you do not like the password authentication protecting your contacts you can disable it by selecting Menu gt Options gt Authenticat
8. nect at startup when the phone starts a data connection will be automatically set up and green VOIP text will be printed on the status bar of the Cryptech 3G home screen If the VOIP text is coloured gray it means that the application is disconnected or the connection is disabled at startup in which case press Menu gt Voip gt Connect If there is no VOIP text but three green dots appear in its place it means that the system is trying to connect If the three green dots persist for too long usually it means that there is a problem with the connection check the network configuration or the remaining billed data traffic The connection with the VoIP server is only used to let users reach each other whilst the encryption is always performed between the phones themselves 5 Data traffic consumption During encrypted voice communication about 2 5 KB s per second are consumed in UMTS WiFi and about 1 3 KB s over GPRS EDGE coverage When Cryptech 3G is idle i e not in voice communication but connected to the server VoIP the data consumption is approximately 1 KB per day It is important to take seriously in consideration these parameters in order to underwrite a proper data contract so as not to run the risk of spending too much money for data transfers We recommend to underwrite a flat rate data contract with your operator Since the battery consumption may be affected by the use of Cryptech 3G even when idle we suggest to connect to the VoIP
9. server only when you need to communicate in crypto 6 Making an encrypted call To make an encrypted call while on the Cryptech home screen simply dial the number directly on your keyboard or import the contact from the phonebook select Contact and choose the desired contact among those of Outlook Mobile Then press the green call button after a brief synchronization phase the call is active During synchronization you will see a progress bar The encrypted call starts upon progress bar completion the coloured bar gets to 100 If the bar turns red it means that the system is making a data retransmission due to errors in the connection To change the volume during the call you can use the up down arrows on the multifunction key The volume can also be set for all calls by selecting Menu gt Audio on Cryptech home screen 7 Receiving encrypted calls To answer an incoming encrypted call just press the green button when you hear the ringing After a few seconds during which the encryption key is generated the progress bar gets completed and you can begin to talk safely 8 Automatic SMS Cryptech key generation Cryptech by default generates automatically a cryptographic key for your SMS When you make a crypto call to one of your contacts at the beginning of the connection Cryptech generates a specific key for that contact and will save it until the next call when it will change it You can see it on the display noticing that a green
10. st in security 4 You can decide whether to generate automatically the encryption keys for SMS during a crypto call with the contact 15 Language Selection Under Options gt Language you will find the option to choose the language which will be used for the encryption software By default the same language as the Operating System is selected Intellectual Property of Casper Technology s r l all trademarks are property of their respective owners Operations and Sales Office Via Cardinal Massaia 83 10147 Torino TO Italy Tel 390112303634 Fax 3901 12303632 Web http www caspertech com Email info caspertech com
11. t della trasmissione In particolare il passaggio da una cella UMTS ad una GPRS e viceversa pu generare un buco di diversi secondi Cryptech 3G is designed to use any communications network available on the internet phone It s important to first configure the settings for UMTS network so that you can always be reached When you are in the range of a WiFi router e g office or public hotspot just turn on the WiFi on the phone configure the appropriate access key and use Cryptech 3G services on the network In this way the traffic will not affect your phone bill You can also have more than one active connection UMTS and WiFi in this case the phone will automatically switch traffic between WiFi and UMTS depending on availability trying firstly to connect via WiFi and switching to UMTS when the latter is no longer available Cryptech 3G can also be used in motion but then there may be transmission problems relating to HANG OVER between the cells These problems manifest as holes in the communication or transmission delays which are recovered Intellectual Property of Casper Technology s r l all trademarks are property of their respective owners Operations and Sales Office Via Cardinal Massaia 83 10147 Torino TO Italy Tel 390112303634 Fax 3901 12303632 Web http www caspertech com Email info caspertech com CASPERTECH 48533 CRYPTECH 3G USER MANUAL as soon as possible The sound quality and delay continuously adapt in r
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