On the GSMK CryptoPhone some information, such as contacts and SMS, is stored in Flash Storage. Flash type storage is safe against failure of the backup-battery. You must however be aware that there is no way to securely erase information stored in flash memory in a way that it cannot be possibly reconstructed by sophisticated methods of computer forensics. Even if you erase the information and overwrite it with other data,it cannot be considered safely destroyed when stored on Flash Storage. Flash memory uses its own way of managing files that is beyond the control of the operating system.
Your CryptoPhone is a Communication Security (CCOMSEC) device. It can only be regarded as secure as long as you have
permanent and uninterrupted physical control
over the CryptoPhone. Once an adversary could have gained temporary physical possession of the CryptoPhone,
it must be regarded as compromised. There is a variety of potential methods that would allow an adversary to listen into your calls after
he manipulated the CryptoPhone and gave it back to you. Keep the handset with you securely at all times.You should take it with you to
the bathroom, put it beside your bed when you sleep and not leave it alone in the hotel
If you have »lost« the CryptoPhone and »find« it back again, it has to be regarded as compromised. Never lend your CryptoPhone. Major
intelligence agencies are known for a wide variety of high-tech manipulation methods that are impossible to detect without a massive
scientific effort (several months of analysis at the cost of several 100.000 Euros per device).. If in doubt and your security depends on it, consider
purchasing a fresh unit.