Decipherable searchable encryption method, system for such an encryption
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United States of America Patent
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Jul 24, 2012
Grant Date -
Jan 8, 2009
app pub date -
Mar 8, 2007
filing date -
Mar 15, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A method for encrypting/decrypting a message includes the initial step of generating keys by the sub-steps of generating a public key; generating a decryption key; and generating a derivation key. For a first entity, the message is encrypted using the public key and a cipher. For a second entity, the cipher is decrypted to find the message. A trapdoor associated with said message is generated. The trapdoor corresponds to a derivative of the derivation key specific to the message. A test cipher is tested, using the trapdoor associated with the message, to determine if the test cipher is an encryption of the message using the public key.
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