The Invention of Mobile Phone - College Essay - 406 Words
The invention of mobile phones began in 1880 with the development of the photophone by Alexander Graham Bell. Bell’s idea to transmit sound via light instead of wiring was well ahead of his time, just as his invention of the standard telephone back in 1876. The subsequent invention of the radiophone (walkie-talkies) by Dan Noble and the car phone gave way to the development of the mobile phone in 1973 by Martin Cooper. The cell phone has since become one of the most utilized and advanced personal technology devices in existence today.
Invention Of Mobile Phone [ History ] ~ TECH
Who Invented Mobile Phone? | Aapka Times
In contrast to the prior art, the present invention mobile phone restricts a crypto-key from being stored in an expansion memory to protect a ciphered document, so the ciphered document cannot be easily hacked when the expansion memory is stolen. Moreover, the crypto-key is generated according to an identity of the mobile phone, such as an IMEI, so the crypto-key cannot be generated without the correct identify of the mobile phone and the ciphered document, thus, cannot be decrypted successfully by any non-authorized user.
Mobile Phone History - Invention of the Mobile Phone