Secure Mobile Communication Solution offers Encrypt phone calls, text, messaging and file sharing on Android devices.

CEN-02S Encryption card is FIPS 140-2 Level 3 and CC EAL 5+ approval.
        
What is FIPS ?
The Federal Information Processing Standard (FIPS) is a U.S. government computer security standard used to accredit cryptographic modules. The FIPS program is run by the National Institute of Standards (NIST). NIST FIPS 140 is the cryptography standard program required by the US federal government for protection of sensitive data. All products using cryptography in use by civilian and military US federal agencies must comply with FIPS 140.
 
FIPS 140-2 defines four levels of security, simply named "Level 1" to "Level 4".
CEN-02S Encrypted micro SD card is in “Level 3”.
Security Level 3 attempts to prevent the intruder from gaining access to CSPs held within the cryptographic module. Physical security mechanisms required at Security Level 3 are intended to have a high probability of detecting and responding to attempts at physical access, use or modification of the cryptographic module. The physical security mechanisms may include the use of strong enclosures and tamper-detection/response circuitry that zeroes all plaintext CSPs when the removable covers/doors of the cryptographic module are opened.
Details, please check https://en.wikipedia.org/wiki/FIPS_140-2
The Evaluation Assurance Level of an IT product or system is a numerical grade assigned following the completion of a Common Criteria security evaluation, an international standard. To achieve a particular EAL, the computer system must meet specific assurance requirements. Most of these requirements involve design documentation, design analysis, functional testing, or penetration testing.

CEN-02S encrypted micro SD card is EAL 5 approval.