Method and system for many-to-many symmetric cryptography and a network employing the same

A method for many-to-many symmetric cryptography, comprising:

• in a communication network comprising a plurality of cryptographic modules, each module storing computer readable instructions for execution by at least one microprocessor, the method comprising:
• at a cryptographic module, receiving a document, comprising:
• receiving a token;
• performing a walk through an entropy space, which is a large set of random bits, to fetch a string of bits, the walk through and the fetched string of bits depending on the token;
• generating a secret key for encrypting the document based on the fetched string of bits, thereby generating an encrypted document;
• and
• destroying the secret key upon encrypting the document;
• transmitting the encrypted document and the token to another cryptographic module over a communication network, for decryption, comprising:
• at said another cryptographic module:
• receiving the token;
• performing the walk through the entropy space to fetch the string of bits;
• and
• generating the secret key for decrypting the encrypted document based on the fetched string of bits;
• thereby avoiding storing or communicating the secret key.

A communication network, comprising:

• a plurality of cryptographic modules in communication over the communication network, each cryptographic module comprising computer readable instructions stored in a memory device for execution by a processor;
• at one of the plurality of cryptographic modules, the computer readable instructions causing the processor to:
• receive a document for encryption:
• receive a token;
• perform a walk through an entropy space, which is a large set of random bits, to fetch a string of bits, the walk through and the fetched string of bits depending on the token;
• generate a secret key for encrypting the document based on the fetched string of bits,
• thereby generating an encrypted document;
• and
• destroy the secret key upon encrypting the document;
• transmit the encrypted document and the token to another one of the plurality of cryptographic modules over the communication network, for decryption;
• at said another one of the plurality of cryptographic modules, the computer readable instructions causing the processor to:
• receive the token;
• perform the walk through the entropy space to fetch the string of bits;
• and
• generate the secret key for decrypting the encrypted document based on the fetched string of bits;
• thereby avoiding storing or communicating the secret key.