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    • 4. 发明授权
    • Apparatus and method for reconstructing data using cross-parity stripes on storage media
    • 用于在存储介质上使用交叉奇偶校验条带来重建数据的装置和方法
    • US06581185B1
    • 2003-06-17
    • US09490258
    • 2000-01-24
    • James Prescott Hughes
    • James Prescott Hughes
    • G06F1100
    • G06F11/1076G06F2211/108G11B20/1833H03M13/11
    • An apparatus and method for reconstructing missing data using cross-parity stripes on a storage medium is provided. The apparatus and method may operate on data symbols having sizes greater than a data bit. The apparatus and method makes use of a plurality of parity stripes for reconstructing missing data stripes. The parity symbol values in the parity stripes are used as a basis for determining the value of the missing data symbol in a data stripe. A correction matrix is shifted along the data stripes, correcting missing data symbols as it is shifted. The correction is performed from the outside data stripes towards the inner data stripes to thereby use previously reconstructed data symbols to reconstruct other missing data symbols.
    • 提供了一种用于在存储介质上使用交叉奇偶校验条重建丢失数据的装置和方法。 该装置和方法可以对具有大于数据位的大小的数据符号进行操作。 该装置和方法利用多个奇偶校验条来重建丢失的数据条带。 奇偶校验条带中的奇偶校验符号值用作确定数据条带中缺失数据符号的值的基础。 校正矩阵沿着数据条带移位,校正丢失的数据符号,因为它被移位。 从外部数据条纹到内部数据条纹执行校正,从而使用先前重建的数据符号来重建其他丢失的数据符号。
    • 5. 发明授权
    • Encryption key management system using multiple smart cards
    • 加密密钥管理系统使用多个智能卡
    • US06831982B1
    • 2004-12-14
    • US09443963
    • 1999-11-19
    • James Prescott HughesSteven Harvey McCown
    • James Prescott HughesSteven Harvey McCown
    • H04L900
    • G07F7/1008G06Q20/341G06Q20/40975H04L9/0877H04L9/0891
    • Initially, a key range variable is created by concatenating the card group value, card number and reference number for an encryption key to be generated. A hashing algorithm generates an encryption key from a master key and the variable key range variable. The encryption key and the key range variable are output to the caller who requested the key. The encryption key is used to encrypt the information, while the variable key range is stored with the encrypted data. Generation of a decryption key requires a user call for a decryption key and includes the key range variable from the encrypted data. A hashing algorithm generates a decryption key from the master key and the key range variable. The decryption key is used to decrypt the information.
    • 最初,通过连接要生成的加密密钥的卡组值,卡号和参考号来创建键范围变量。 哈希算法从主键和变量键范围变量生成加密密钥。 加密密钥和密钥范围变量被输出到请求密钥的呼叫方。 加密密钥用于加密信息,而可变密钥范围与加密数据一起存储。 生成解密密钥需要用户呼叫解密密钥,并且包括来自加密数据的密钥范围变量。 哈希算法从主密钥和密钥范围变量生成解密密钥。 解密密钥用于解密信息。
    • 6. 发明授权
    • Apparatus and method for writing and reading data to and from a virtual volume of redundant storage devices
    • 用于向虚拟卷冗余存储设备写入和读取数据的装置和方法
    • US06529997B1
    • 2003-03-04
    • US09638205
    • 2000-08-11
    • Jacques DebiezCharles Allen MilliganJames Prescott Hughes
    • Jacques DebiezCharles Allen MilliganJames Prescott Hughes
    • G06F1200
    • G06F3/064G06F3/0614G06F3/0665G06F3/0689G06F11/1008
    • An apparatus and method for writing and reading data to and from a virtual volume of redundant storage devices is provided. The apparatus and method make use of metadata identifying the number of data storage devices and number of parity storage devices in the virtual volume of redundant storage devices. In addition, other metadata, such as the identity of the data storage devices and parity storage devices may be utilized. The metadata is stored with each block written to each of the storage devices. In the event of a failure of a storage device, the metadata is modified to reflect the failure and the storage device to which the data intended for the failed storage device was written. In this way, if a failure of a storage device is encountered, each block in the virtual volume of redundant storage devices has enough information in the metadata to identify where to find the data that was intended for the failed storage device. Thus, reconstruction of data using parity information is not required.
    • 提供了一种用于向虚拟卷冗余存储设备写入数据和从其读取数据的设备和方法。 该装置和方法利用标识数据存储设备的数量和冗余存储设备的虚拟卷中的奇偶校验存储设备的数量的元数据。 此外,可以利用诸如数据存储设备和奇偶校验存储设备的标识的其他元数据。 存储每个块写入到每个存储设备的元数据。 在存储设备发生故障的情况下,元数据被修改以反映故障,并且写入用于故障存储设备的数据的存储设备被写入。 以这种方式,如果遇到存储设备的故障,冗余存储设备的虚拟卷中的每个块在元数据中具有足够的信息,以标识在哪里找到用于故障存储设备的数据。 因此,不需要使用奇偶校验信息来重构数据。