Secured smartphone communication system

A secure communication system comprising:

• a modified off-the-shelf smartphone comprising a security insert in a battery compartment of the off-the-shelf smartphone, wherein the security insert comprises a cryptographic module;
• a Smartphone-Insert-in-Battery-Compartment (SIBC) connector that is added and located inside the battery compartment and is configured to power the security insert;
• and
• a power source that delivers the power to the security insert from any one of or the combination of (a) a smartphone docking connector through the SIBC connector, and (b) a security insert docking connector, wherein the security insert is configured to occupy the entire battery compartment of the and lacks a battery to deliver power to the modified off-the-shelf smartphone, wherein the secure communication system wirelessly transmits outgoing cellular encrypted black data, which is encrypted by the cryptographic module, from the modified off-the-shelf smartphone, prior to transmission wherein incoming cellular black data received from the cellular network by the modified off-the-shelf smartphone is decrypted by the cryptographic module, and wherein the SIBC connector comprises a smartphone-side SIBC connector and a matching security-insert-side SIBC connector on an enclosure of the security insert.

A security insert for secure communication system comprising:

• an enclosure configured to be deployed in a battery compartment of an off-the-shelf smartphone;
• a cryptographic module;
• and
• a Smartphone-Insert-in-Battery-Compartment (SIBC) connector configured to be coupled to a matching SIBC connector that resides in a battery compartment of a modified off-the-shelf smartphone, and configured to transfer data between the security insert and the off-the-shelf smartphone,
• wherein the secure communication system transmits and receives encrypted data and the cryptographic module encrypts the transmitted data and decrypts the received encrypted data respectively, and wherein the security insert is configured to occupy an entirety of the battery compartment and lacks a battery to deliver power to the off-the-shelf smartphone.