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2 results about "Secure Hash Algorithm" patented technology
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The Secure Hash Algorithm is a family of cryptographic hash functions published by the National Institute of Standards and Technology as a U.S. Federal Information Processing Standard, including: SHA-0: A retronym applied to the original version of the 160-bit hash function published in 1993 under the name "SHA". It was withdrawn shortly after publication due to an undisclosed "significant flaw" and replaced by the slightly revised version SHA-1. SHA-1: A 160-bit hash function which resembles the earlier MD5 algorithm. This was designed by the National Security Agency to be part of the Digital Signature Algorithm. Cryptographic weaknesses were discovered in SHA-1, and the standard was no longer approved for most cryptographic uses after 2010. SHA-2: A family of two similar hash functions, with different block sizes, known as SHA-256 and SHA-512. They differ in the word size; SHA-256 uses 32-bit words where SHA-512 uses 64-bit words. There are also truncated versions of each standard, known as SHA-224 and SHA-384. These were also designed by the NSA. SHA-3: A hash function formerly called Keccak, chosen in 2012 after a public competition among non-NSA designers.
Systems, methods, and media for capturing transaction information through a payment network
A system and methods to capture, store, track, and sort through receipt information details following a merchant / purchaser transaction executed through an electronic payment system. The system provides storage and analytical capabilities to provide access to and the utilization of the captured data by the merchant user, the purchaser user, and permitted third parties. The system operates by a secure hashing algorithm receiving a plurality of transaction information from a point of sale system. The secure hashing algorithm generates a primary key using the plurality of transaction information. A database receives and stores the primary key. The primary key is used when sending the plurality of transaction information to the database to encrypt the plurality of transaction information.
Owner:DAY AYRTON J
Blockchain-based vaccine production whole-process data traceability management method and system
This invention belongs to the field of biopharmaceutical management and public health safety supervision technology. It discloses a blockchain-based method and system for data traceability management of the entire vaccine production process. The method includes: a regulatory server acquiring production business timestamps reflecting the progress of vaccine batch production; production nodes collecting business data packets representing the process status of specific vaccine production procedures; inputting a dynamic random supervision factor as an initial perturbation parameter into a preset secure hash algorithm logic; storing the current block hash value and associated business data packets as an irreversible traceability data block; and the regulatory server calling a smart contract to extract the current block hash value from the traceability data block. This invention establishes a causal interlocking mechanism between process data and physical environment background, blocking the path for production entities to input non-real business data using virtual simulation or protocol replay technology.
Owner:CHANGCHUN BCHT BIOTECH