Method and system for establishing secure communications using composite key cryptography
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United States of America Patent
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Dec 16, 2014
Grant Date -
Feb 13, 2014
app pub date -
Mar 7, 2013
filing date -
Jul 25, 2011
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Abstract
A method is disclosed for establishing a secure communication session using composite key cryptography. The method comprises generating a first plurality of secret keys all of which are known only to a first communicating party and each one of which is shared with exactly one of a plurality of stewards, and generating a second plurality of secret keys all of which are known only to a second communicating party and each one of which is shared with exactly one of the plurality of stewards. The first and second communicating parties each send information to the other through different stewards, each communication leg being encrypted using a secret key known only to the respective communicating party and steward. These communications are usable to distribute cryptographic seeds to the communicating parties for use in generating a temporary session key that can be used to encrypt direct communications between the parties.
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