114 results about "Cryptographic hash function" patented technology

The present invention involves systems and methods that allow participants in cryptocurrency networks to exchange cryptocurrency for traditional currency legally and safely without requiring the use of a traditional exchange or online brokerage as a fiduciary. The invention accomplishes this through the use of a decentralized identity verification protocol that allows a service provider to verify the identity of a participant and then publish an identity signature on the participant's cryptocurrency address or addresses. The invention enables full compliance with Country specific customer identification program and anti-money laundering requirements, and maintains the ability to independently satisfy requests for information or data retention requirements if requested by legally authorized parties, but does not require that the participant store the private keys or access controls to their cryptocurrency on an exchange or brokerage service.

The invention serves to verify a participant's identity in full compliance with US Bank Secrecy and Patriot Act provisions or similar regulations where identification may be achieved through non-documentary or documentary identity verification procedures. After passing the applicable verification procedure, the service provider stamps the participant's cryptocurrency address with a transaction containing an identity signature. This identity signature within the transaction consists of a public indicator of the participant's Country and subdivision, a compliance level code, an ID type indicator, and an identity hash. The identity hash is created from the digests of cryptographic hash functions where the participant's personal information is used as an input. The service provider signs the transaction with their authorized private key that corresponds to their publicly accessible public key. This serves as a publicly verifiable confirmation that the identity associated with the address in question was validated by the service provider authorized to act on behalf of the regulatory authority.

The participant may then purchase and sell cryptographic currency from and to a third party exchange or brokerage service legally and safely when using their verified cryptocurrency address. This is because the third party is able to confirm compliance by openly referencing and verifying the identity verification transaction present on the address. Subsequent transactions where the third party sells or purchases cryptocurrency for the verified participant are similarly stamped with a transaction conforming to the identity verification protocol. This allows the third party interacting with the verified participant's address to observe any regulations limiting the amount or frequency of transactions over a variable period of time. It follows that this address could be used with any third party or participant in the cryptocurrency network that observes the decentralized identity verification protocol, all without requiring the third party or participant to collect and verify personal information redundantly. The ability to verify an identity remotely also eliminates the need for the third party to act as a fiduciary holding the private keys or access controls to the verified address. Lawful requests for information by authorized authorities are served to the service provider as digitally signed transactions that may then be linked to the participant's identity and transactions, allowing the protocol to observe subpoenas or similar lawful requests for information. The encrypted personal information may be held in escrow by the service provider indexed to the verified cryptocurrency address for such purposes. An alternate embodiment would store the encrypted personal information in a decentralized network of other participants, with the information accessible for retrieval using the public key of the verified cryptocurrency address and decryption using the corresponding private key, decentralizing the process entirely except for the identity verification step.

A method and apparatus for creating and/or using trustworthy timestamps and certifiable clocks using logs linked by cryptographic hashes. In one embodiment, the method comprises maintaining a first, chained-hash log; associating a first clock with the chained-hash log, and entangling the first log; with a second by adding a time-stamped synchronization entry to the chained-hash log, where the synchronization entry has a second time indication associated with the second log and a hash of one or more entries in the first log.

A processor including general-purpose and cryptographic functionality, in which cryptographic operations are visible to user-specified software. According to one embodiment, a processor may include instruction execution logic configured to execute instructions specified by a user of the processor, where the instructions are compliant with a general-purpose instruction set architecture. The processor may further include a cryptographic functional unit configured to implement a plurality of cryptographic operations, and further configured to process the cryptographic operations independently of the instruction execution logic. A subset of the instructions may be executable to cause individual ones of the cryptographic operations to be processed by the cryptographic functional unit.

System and method for confirming and transferring information from one party to another via block chain escort, using central and decentralized databases acting as online storage providers. Files are linked to cryptographic currency structures comprised of a public and private key identification processes. Locking, unlocking, retrieving, storing, confirming and transferring files requires linked association to block chain protocol measures of crypto-currency processes.

Establishing file space requires that the owner links it to a centralized or decentralized peer-to-peer cryptographic block chain protocol. This secures and locks files for subsequent confirmation and transfer. Confirmation and transfer of the file is processed with a cryptographic hash function of crypto currency block chain process. The system and method requires that the transferee obtain the file using crypto currency transfer protocol. The system and method associates a piece of information with a public key and private keys, which are accessed only by the owner.

The present solution provides systems and methods for generating DNS queries that are more resistant to being compromised by attackers. To generate the transaction identifier, the DNS resolver uses a cryptographic hash function. The inputs to the hash function may include a predetermined random number, the destination IP address of the name server to be queried, and the domain name to be queried. Because of the inclusion of the name server's IP address in the formula, queries for the same domain name to different name servers may have different transaction identifiers, preventing an attacker from observing a query and predicting the identifiers for other queries. Additional entropy may be provided for generating transaction identifiers by including the port number of the name server and/or a portion of the domain name as inputs to the hash function. If it is determined that the responding server may preserve capitalization in its responses, the upper and lower case characters may be salted within the domain name to provide additional entropy in generating transaction identifiers.

Embodiments of the present invention provide a system for multiplexing and demultiplexing blockchain ledgers via a cryptographic hash. In particular, the invention uses cryptographic keys and hashes to combine and dissociate blockchain records from the private blockchains two or more entities. The system provides a mechanism by which blockchains owned by distinct entities may be multiplexed upon formation of a union between the entities, in order to securely share data records and establish an authentic, tamper-resistant timeline for said data records. Furthermore, the system provides a mechanism by which the blockchains may be demultiplexed upon dissolution of said union.

A process and system for generating a pseudo-random number is presented. Input data having entropy is gathered in an Entropy Pool and transformed once by a cryptographic hash function. The transformed data forms the internal state of the pseudo-random number generator. The generator forms the output by applying a second cryptographic hash function to this internal state. Finally, the generator updates the internal state by inputting the current internal state and data from the Entropy Pool into a third cryptographic hash function. The output of the third hash function forms the new internal state of the pseudo-random number generator.

A method of protecting the execution of a cryptographic hash function, such as SHA-256, in a computing environment where inputs, outputs and intermediate values can be observed. The method consists of encoding input messages so that hash function inputs are placed in a transformed domain, and then applying a transformed cryptographic hash function to produce an encoded output digest; the transformed cryptographic hash function implements the cryptographic hash function in the transformed domain.

A system and a method of receiving object data representing one or more discriminating characteristics of a physical object or group of physical objects is described herein. The method includes: processing the object data by means of a machine-learning-based object recognition process to obtain discriminating data representing one or more collision resistant virtual representations of the physical object or group of physical objects; comparing at least one of the discriminating data and an original hash value derived therefrom by application of a pre-determined cryptographic hash function thereto with corresponding reference data stored in one or more data repositories with restricted access; and, if said comparison with the reference data results in a match, outputting digitally signed identification data comprising said hash value.

Representing a number of assets on an originating computer begins with selecting the assets to be represented. Cryptographic hash asset identifiers are generated; each of the asset identifiers is computed using the contents of a particular asset. The asset identifier is a content-based or content-addressable asset name for the asset and is location independent. An asset list is generated that includes the asset identifiers computed from the assets. A cryptographic hash asset list identifier is generated that is computed from the asset list. The asset list identifier is stored for later retrieval. The assets selected are also stored for safekeeping either locally or on a computer network. In the event of loss of the files from the originating computer, the asset list identifier is retrieved. Using the asset list identifier, the original asset list is found and retrieved from its safe location. The asset identifiers from the retrieved asset list are used to find and retrieve the individual assets from their backup locations. The assets are verified by recomputing the cryptographic hash asset identifier for each asset retrieved and comparing it to the asset identifier from the asset list. The MD5 algorithm is used for the cryptographic hash function. Assets are retrieved using a multicast protocol. A series of importer programs searches for assets to retrieve in progressively more remote locations. Assets are retrieved whole or in segments.

The present invention relates to the field of anti-counterfeit protection of products. Specifically, the invention is directed to a composite security marking for a physical object, in particular to an anti-counterfeit product marking. In particular, without limitation, such composite security marking can be used in connection with or can form a component of a multi-component security system, in particular of an anti-counterfeit protection system, which is also disclosed herein as part of an overall solution for anti-counterfeit protection. The composite security marking comprises a physical unclonable function, PUF, and a representation of a digital signature or of a pointer indicating a location where said digital signature can be accessed. The digital signature digitally signs a hash value resulting from application of a predetermined cryptographic hash function to data representing a response generated by the PUF in reaction to a challenge of a predetermined challenge-response authentication scheme.

A system that facilitates efficient code construction comprises a component that receives a first code and a transformation component that transforms the first code to a new code. The new code has essentially same length parameters as the first code but is hidden to a computationally bounded adversary. The first code can be designed in the noise model and appear random to a computationally bounded adversary upon transformation.

Method and system of key distribution by trusted nodes for a vehicular ad hoc network, the nodes of said network having at least one pair of public-private keys and the corresponding certificates, issued by a CA, said method comprising each vehicle node, on entering said network region, requesting a set of keys from an RSU node that is within range and within that region, said RSU node sending said vehicle node a set of private keys, selected from a pool of private keys, and a list with the key identifiers of the private keys shared by said vehicle node and the other vehicle nodes that have most recently contacted said RSU for a predetermined period of time; such that two nodes are able to establish a secure connection without further interaction by deriving a shared secret which is a cryptographic hash function of the keys shared by said two nodes.

A method and apparatus for playing back a media content instance is disclosed. The method permits the use of downloadable variants to upgrade or change cryptographic functions performed by the playback device, thus permitting content protection schemes to be renewed.