Securing an Encryption Key of a User Device While Preserving Simplified User Experience
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United States of America Patent
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Issued Date -
Jan 1, 2015
app pub date -
Jun 27, 2013
filing date -
Jun 27, 2013
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Abstract
A user device generates a key for encrypting and decrypting data of an application suite, uses a long secret to encrypt the key, and stores the key locally only as encrypted. The key is stored, along with a user-provided short secret, in a non-volatile memory of a server. Preferably, the key is generated only if an indication is received from the server that the long secret is identical to a reference long secret. The user obtains the key either by presenting the short secret to the server or by presenting the long secret to the user device to enable the user device to decrypt the encrypted key.
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