569 results about "Randomization" patented technology

Methods and systems are disclosed for the generation and use of merchant-customizable token formats that define tokens that represent credit card and other payment numbers in online transactions. The tokens, which are used instead of the card numbers themselves for security, can be specified by the token format to have a certain number of characters, have certain fields reserved for major card identifiers, use encryption and / or randomization, be alphanumeric, and have other formatting. The customized tokens can be used with legacy equipment that uses longer or shorter card numbers than the standard sixteen-digit payment card number format and can be less likely to be recognized as related to card numbers by identify thieves.

Original data to be stored in a nonvolatile memory are first randomized while preserving the size of the original data, In response for a request for the original data, the randomized data are retrieved, derandomized and exported without authenticating the requesting entity. ECC encoding is applied either before or after randomizing; correspondingly, ECC decoding is applied either after or before derandomizing.

A playing card system is disclosed comprising a face side displaying markings, which can be hidden and revealed by an adjustable barrier. A set of these playing cards may be used in the same games as those using a standard deck of cards. A shuffler randomizes the order and / or arrangement of the one or more sets through an agitation mechanism. The shuffling system allows for heightened randomization and secrecy of the markings, and minimizes opportunities for manipulation.

Methods and apparatus are provided for verifying and validating operation of a design under test (DUT). Input data sequences having information used to check expected outputs are provided to a DUT. The input data sequences include checking headers and data. The checking headers and data are randomized using encryption to verify and validate operation of the DUT on a variety of bit sequences. Different keys are used to allow further scrambling.

A method used for a flash memory module having a plurality of storage blocks each can be used as a first block or a second block includes: classifying data into a plurality of groups of data; respectively executing error code encoding to generate a first corresponding parity check code to store the groups of data and the first corresponding parity check code into the flash memory module as first blocks; reading out the groups of data from the first blocks; executing error correction and de-randomize operation upon read out data to generate de-randomized data; executing randomize operation upon the de-randomized data according to a set of seeds to generate randomized data; performing error code encoding upon the randomized data to generate a second corresponding parity check code; and storing the randomized data and the second corresponding parity check code into the flash memory module as the second block.

A method and apparatus for scalable inquiries in a network of communicating peers are provided. The method and apparatus of the present invention make use of communal filters and randomization to determine which client devices will output a message that is to be broadcast to a community of client devices. Each message is assigned a probability value that is determined based on various criteria or may be determined randomly. The message is then transmitted to the client devices who apply their own respective display criteria to the message parameters to determine if the message is one that is of interest to the user of the client device. If the message is not of interest to the user of the client device, the message is discarded. If the message is of interest to the user, logic is applied to the parameters of the message to determine whether the message should be displayed to the user or not. This logic may involve determining whether the message has been previously displayed to the user, whether the message has been received but not previously displayed, and the like. In addition, if the message has not been previously displayed to the user, a randomly generated number, which may be weighted based on other criteria, is generated and compared with the probability value associated with the message. Based on this comparison, the message is either displayed or not displayed on the client device. This probability value of the message may be adjusted with each subsequent rebroadcast of the message to increase the size of the subset of users that will see the message.

A method and apparatus for scalable inquiries in a network of communicating peers are provided. The method and apparatus of the present invention make use of communal filters and randomization to determine which client devices will output a message that is to be broadcast to a community of client devices. Each message is assigned a probability value that is determined based on various criteria or may be determined randomly. The message is then transmitted to the client devices who apply their own respective display criteria to the message parameters to determine if the message is one that is of interest to the user of the client device. If the message is not of interest to the user of the client device, the message is discarded. If the message is of interest to the user, logic is applied to the parameters of the message to determine whether the message should be displayed to the user or not. This logic may involve determining whether the message has been previously displayed to the user, whether the message has been received but not previously displayed, and the like. In addition, if the message has not been previously displayed to the user, a randomly generated number, which may be weighted based on other criteria, is generated and compared with the probability value associated with the message. Based on this comparison, the message is either displayed or not displayed on the client device. This probability value of the message may be adjusted with each subsequent rebroadcast of the message to increase the size of the subset of users that will see the message.

A method for remote services authentication in an internet hosted environment includes a high level process and functionality for a secure, practical and logically optimized inter-network authentication mechanism by employees, partners and customers of an enterprise into the hosted Internet site. The lightweight authentication and authorization mechanism can be most effectively implemented in Java as part of the application or web server servlet. The method for remote services authentication includes initial secure password establishment, subsequent authentication and authorization, as well as authentication and authorization upon resuming previously run sessions with the hosted server using Internet cookies.