초록 ▼

A method, using a secret key, to protect information in a storage disk of a computer, where the secret key is derived from a password entered into the computer by an authorized user. The method begins by applying a length-increasing pseudorandom function to the secret key and an index to generate a

A method, using a secret key, to protect information in a storage disk of a computer, where the secret key is derived from a password entered into the computer by an authorized user. The method begins by applying a length-increasing pseudorandom function to the secret key and an index to generate a pseudorandom bit string having a length that is a function of the size of a sector of the storage disk. The sector is associated or otherwise identified by the index used by the pseudorandom function to generate the pseudorandom bit string. The pseudorandom bit string is then used to encrypt and decrypt data accesses to and from the sector.

대표청구항 ▼

An article of manufacture, comprising: a computer-readable storage medium having a substrate; and computer program data encoded in the substrate of the computer-readable storage medium, wherein the computer program data comprises: means for applying a length-increasing pseudorandom function to a sec

An article of manufacture, comprising: a computer-readable storage medium having a substrate; and computer program data encoded in the substrate of the computer-readable storage medium, wherein the computer program data comprises: means for applying a length-increasing pseudorandom function to a secret key and an index to generate a pseudorandom bit string having a length equal to a sector of the storage disk associated with the index; and means for using the pseudorandom bit string to encrypt data accesses to the sector of the storage disk and to decrypt data accesses from the sector of the storage disk.