Abstract: Systems and methods for assessing and authenticating transactions. Some exemplary embodiments may authenticate transactions based at least in part on a comparison of a newly obtained electronic signature associated with a user with a previously obtained electronic signature associated with the user, where a payment instrument presented for use in the transaction is also associated with the user. Exemplary electronic signatures may comprise any information which may identify the user, such as browser fingerprints, computer fingerprints, IP addresses, geographic IP location information, information associated with a payment, and/or a typing pattern.

Abstract: In some examples, a computerized sanction screening system may include an automated system for collection of sanction information, and a routine for analyzing additional available data related to sanction information entities. The system may also include an automated analysis summary routine for creating condensed information subsets or graphlets containing relevant information about sanction entities, some of which can be entities themselves, organized in a data retrieval system, such that an automated transaction system can check data from transactions and automatically identify and flag potentially sanctioned transactions. Then upon exceeding a preset contextual limit, a potential blocking warning is issued.