Google Inc.

Theodore Yue Tak Ts'o

Uday R Savagaonkar

Michael A Halcrow

Ildar Muslukhov

An electronic device implements a method of encrypting directories of a file system. A processor receives a request to access a directory entry of a file system, and identifies a user who is logged into the electronic device. The processor determines whether the user has access to a directory encryption key associated with the directory entry and, if not, identifies an encrypted file name stored in the directory entry, and determines whether the encrypted file name complies with one or more naming rules. If the encrypted file name does not comply with one or more naming rules, the processor applies one or more functions to a file name associated with the encrypted file name to generate an encoded encrypted file name that complies with the one or more naming rules, and causes the encoded encrypted file name to be displayed as a representation of the directory entry.

Methods and systems of encrypting file system directories

A method of providing a secure, reliable and verifiable seed generation a random number generator. The method includes determining a first input based upon at least one entropy source related to operation of the processing device. For example, the entropy source can be random information related to the current operation of a computing device. The method further includes accessing a secret input that is unique to the processing device and combining the first input and the secret input via a secure cryptographic combining function, wherein the secret input and the secure cryptographic combining function are stored in a hardware-based storage medium associated with a specific processing device such that they are accessible only by that specific processing device. Based upon the combination, the method includes determining a first output value and outputting the first output value as a random seed for a random number generator.

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Mountain View, CA, United States of America

Theodore Yue Tak Ts'o