摘要:
A Metadata server described herein is configured to generate a metadata table optimized for data durability and recovery. In generating the metadata table, the metadata server associates each possible combination of servers with one of the indices of the table, thereby ensuring that each server participates in recovery in the event of a server failure. In addition, the metadata server may also associate one or more additional servers with each index to provide added data durability. Upon generating the metadata table, the metadata server provides the metadata table to clients or servers. Alternatively, the metadata server may provide rules and parameters to clients to enable those clients to identify servers storing data items. The clients may use these parameters and an index as inputs to the rules to determine the identities of servers storing or designated to store data items corresponding to the index.
摘要:
Techniques are described that facilitate cryptographic operations, such as data encryption, signing and others, encryption using a computerized method for multiplying a scalar by a point. In one implementation, a set of random integers is selected, wherein the set comprises at least one integer selected randomly. A string is configured, based in part on the set of random integers. Output in the form of a product of the scalar and the point is then calculated, based on the string.
摘要:
Methods and apparati are provided for use in determining “Squared Weil pairings” and/or “Squared Tate Pairing” based on an elliptic curve, for example, and which are then used to support cryptographic processing of selected information. Significant improvements are provided in computing efficiency over the conventional implementation of the Weil and Tate pairings. The resulting Squared Weil and/or Tate pairings can be substituted for conventional Weil or Tate pairings in a variety of applications.
摘要:
A technology generally related to large-scale computations is described herein. An implementation, described herein, employs a new and improved variant of the Karatsuba multiplication approach.
摘要:
An implementation of a technology, described herein, for facilitating cryptographic systems and techniques. At least one implementation, described herein, maximizes the speed and security of fast exponentiation while minimizing its expense. At least one implementation, described herein, employs elliptic curves with a fast exponentiation technique so that it maximizes speed and security while minimizing expense. At least one implementation, described herein, employs Koblitz exponentiation with “bucketing” techniques to maximize speed and security of cryptosystems while minimizing expense of such techniques. This abstract itself is not intended to limit the scope of this patent. The scope of the present invention is pointed out in the appending claims.
摘要:
A cryptosystem has a secret based on an order of a group of points on a Jacobian of a curve. In certain embodiments, the cryptosystem is used to generate a product identifier corresponding to a particular product. The product identifier is generated by initially receiving a value associated with a copy (or copies) of a product. The received value is padded using a recognizable pattern, and the padded value is converted to a number represented by a particular number of bits. The number is then converted to an element of the Jacobian of the curve, and the element is then raised to a particular power. The result of raising the element to the particular power is then compressed and output as the product identifier. Subsequently, the encryption process can be reversed and the decrypted value used to indicate validity and/or authenticity of the product identifier.
摘要:
A method described herein includes acts of executing a cryptographic function over input data utilizing a processor on a computing device and generating a data packet that indicates how the cryptographic function interacts with hardware of the computing device, wherein the hardware of the computing device comprises the processor. The method also includes acts of analyzing the data packet, and generating an indication of security of the cryptographic function with respect to at least one side channel attack based at least in part upon the analyzing of the data packet.
摘要:
A Metadata server described herein is configured to generate a metadata table optimized for data durability and recovery. In generating the metadata table, the metadata server associates each possible combination of servers with one of the indices of the table, thereby ensuring that each server participates in recovery in the event of a server failure. In addition, the metadata server may also associate one or more additional servers with each index to provide added data durability. Upon generating the metadata table, the metadata server provides the metadata table to clients or servers. Alternatively, the metadata server may provide rules and parameters to clients to enable those clients to identify servers storing data items. The clients may use these parameters and an index as inputs to the rules to determine the identities of servers storing or designated to store data items corresponding to the index.
摘要:
A technology generally related to large-scale computations employed in the fields of cryptography and data security system employing a new and improved variant of the Karatsuba multiplication approach. The variant of the Karatsuba multiplication approach being utilized to minimize the number of coefficient multiplications needed to multiple two polynomials of degree four.