Cryptographic communications using pseudo-randomly generated cryptography keys

A cryptographic communication system having a pseudo-random key generator for generating cryptographic keys, said pseudo-random key generator comprising:

• a pseudo-random number generator;
• a timing circuit operatively coupled to said pseudo-random number generator, said timing circuit providing a sequence of current timing values;
• a first computer readable storage area operatively coupled to said pseudo-random number generator, said first computer readable storage area containing a plurality of data values, each data value associated with a unique storage address within said first computer readable storage area;
• a second computer readable storage area operatively coupled to said first computer readable storage area, said second computer readable storage area containing a plurality of key data values, each key data value associated with a unique storage address within said second computer readable storage area,
• wherein the pseudo-random number generator periodically generates a pseudo-random number for every predetermined key change period, wherein each generated pseudo-random number is used to look up a unique address in the first computer readable storage area for retrieving the data value associated with the looked up unique address, and wherein the retrieved data value is used to look up a unique address in the second computer readable storage area for retrieving a key value data, said key value data being used to form a cryptographic key,
• wherein, upon initialization of the pseudo-random key generator, said timing circuit compares a current timing value with a predetermined crypto midnight initialization timing value and cause the pseudo-random number generator to cycle through a set of initialization pseudo-random numbers starting from the crypto midnight initialization timing value until a pseudo-random number is generated for all of the key change periods between the crypto midnight initialization timing value and the current timing value.

A method of generating cryptographic keys using a pseudo-random number generator, a first computer readable storage area, and a second computer readable storage area, said method comprising the steps of:

• inputting into said pseudo-random number generator an initial data value;
• initializing said pseudo-random number generator, said step of initialization includes steps of determining a difference between a crypto midnight initialization time value and a current time value, and causing said pseudo-random number generator to cycle through a set of initial pseudo-random numerical values;
• generating a current time pseudo-random numerical value;
• generating a first data string by using said generated current time pseudo-random numerical value to look up a unique memory address in the first computer readable storage area and retrieving a data value associated with the unique memory address in the first compute readable storage area, said data value being one of a plurality of data values stored in the first computer readable storage area;
• and
• generating a second data string by using said first data string to look up a unique memory address in the second computer readable storage area and retrieving a key data value associated with the unique memory address in the second compute readable storage area, said key data value being one of a plurality of key data values stored in the second computer readable storage area,
• wherein the retrieved key data value is used to form a cryptographic key.