Secure wireless local or metropolitan area network and related methods

A secure wireless data communications device for transmitting plain text in an encrypted message comprising cipher text and an initialization vector, the secure wireless communications device having associated therewith a protocol layer, the device comprising:

• a random initialization vector (IV) generator for generating a random IV;
• a seed generator operable to perform a single-phase hashing algorithm to generate a seed using a secret key, a device address, the random IV, and a changing reference value, the changing reference value comprising a protocol layer sequence number;
• a key encrypter for generating a key sequence based upon the seed;
• a logic circuit for generating the cipher text based upon the key sequence and the plain text;
• and
• a wireless communications device connected to said logic circuit and said random IV generator for wirelessly transmitting the encrypted message comprising the cipher text and random IV.

A wireless local or metropolitan area network comprising:

• a plurality of terminals comprising a transmitting terminal and at least one receiving terminal, the transmitting terminal comprising
• a seed generator operable to perform a hashing algorithm to generate a seed using a secret key, a device address, and a changing reference value;
• a random initialization vector (IV) generator for generating a random IV,
• a key encrypter for generating a key sequence based upon the seed and the random IV,
• a logic circuit generating cipher text based upon the key sequence and plain text, and
• a wireless communications device connected to said logic circuit and said random IV generator for wirelessly transmitting an encrypted message comprising the cipher text and random IV to said at least one receiving terminal, said wireless communications device having associated therewith a media access controller (MAC) layer,
• the changing reference value comprising a MAC layer sequence number.

A wireless local or metropolitan area network comprising:

• a plurality of terminals comprising a transmitting terminal and at least one receiving terminal, the transmitting terminal comprising
• a random initialization vector (IV) generator for generating a random IV,
• a seed generator operable to perform a single-phase hashing algorithm to generate a seed using a secret key, a device address, the random IV, and a changing reference value;
• a key encrypter for generating a key sequence based upon the seed,
• a logic circuit for generating the cipher text based upon the key sequence and the plain text, and
• a wireless communications device connected to said logic circuit and said random IV generator for wirelessly transmitting an encrypted message comprising the cipher text and random IV to said at least one receiving terminal, said wireless communications device having associated therewith a protocol layer,
• the changing reference value comprising a protocol layer sequence number.

A secure wireless data communications method for a wireless local or metropolitan area network comprising a plurality of terminals, the method comprising:

• performing a hashing algorithm at a transmitting terminal to generate a seed, the hashing algorithm using a secret key, a device address, and a changing reference value,
• generating a random initialization vector (IV) at the transmitting terminal;
• generating a key sequence at the transmitting terminal based upon the seed and the random IV;
• encrypting plain text at the transmitting terminal using the key sequence to generate cipher text;
• and
• transmitting the cipher text and random IV from the transmitting terminal to a receiving terminal over the wireless communications link, the wireless link having associated therewith a media access controller (MAC) layer, the changing reference value comprising a MAC layer sequence number.

A secure wireless data communications method for a wireless local or metropolitan area network comprising a plurality of terminals, the method comprising:

• generating a random initialization vector (IV) at a transmitting terminal;
• performing a single-phase hashing algorithm at the transmitting terminal to generate a seed, the single-phase hashing algorithm using a secret key, a device address, the random IV, and a changing reference value;
• generating a key sequence at the transmitting terminal based upon the seed;
• encrypting plain text at the transmitting terminal using the key sequence to generate cipher text;
• and
• transmitting the cipher text and random IV from the transmitting terminal to the receiving terminal over a wireless communications link, the wireless link having associated therewith a protocol layer, the changing reference value comprising a protocol layer sequence number.