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| download | | As a verb: the act of retrieving data from PEP.<br>As a noun: a data set that has been retrieved from PEP. |
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| Data Administrator | DA | The PEP role responsible for [data structuring](Data-structure) and management. |
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| Electronic Data Capturing system | EDC | (Third-party) software used to collect and store data, e.g. from academic research study subjects. PEP provides out-of-the-box integration with the [Castor EDC](https://www.castoredc.com/electronic-data-capture-system/). |
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| [ElGamal encryption](https://en.wikipedia.org/wiki/ElGamal_encryption) | | The cryptographic algorithm used as a basis for PEP's polymorphism. |
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| encryption | | A technique to make information readable only to parties that are in possession of an associated secret. |
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| [enrollment](Access-control#enrollment) | | Providing a user (or other party) with the cryptographic materials required to perform actions in the PEP system. |
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| identifier | ID | A piece of information that uniquely denotes a single piece of data. The polymorphic pseudonym (PP) is PEP's primary [identifier type for rows](https://gitlab.pep.cs.ru.nl/pep-public/user-docs/-/wikis/Pseudonymization#identifiers-in-pep). |
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| participant | | A subject in an academic research study. The term is commonly used in PEP software and documentation as a synonym for a data row. |
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| participant group | | A named set of rows that can be used as a basis for [data access management](Access-control#data-access). |
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| [participant identifier](https://gitlab.pep.cs.ru.nl/pep-public/user-docs/-/wikis/Pseudonymization#participant-identifier) | | A fixed identifier associated with a single PEP row. Participant identifiers are (a.o.) used to create new rows in PEP. |
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| Polymorphic Encryption and Pseudonymization | PEP | A software system geared toward secure, confidential and privacy-preserving data storage and dissemination. |
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| pepAssessor | | A GUI application used for the registration, lookup and management of (academic research) subjects whose data are stored in PEP. Primarily intended for use by research assessors. |
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| polymorphism | | The property of the same data taking different forms in different contexts. PEP provides polymorphism for (participant) pseudonyms and for data encryption. |
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| Polymorphic Encryption and Pseudonymization | PEP | A software system geared toward secure, confidential and privacy-preserving data storage and dissemination. |
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| polymorphic encryption | | (Re-)encrypting data for different recipients without gaining access to the data itself. |
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| polymorphic pseudonym | PP | A row identifier that is partially randomized. While any PP refers to a single row, a row is not uniquely associated with a single PP. |
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| pseudonym | | An identifier that uniquely denotes data, but is not otherwise associated with a real-world entity. Pseudonyms are applied to allow data manipulation without needing to divulge sensitive (e.g. personally identifying) information. |
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| [pseudonymization](Pseudonymization) | | The application of pseudonyms to data, making it difficult or impossible to associate information with a particular person or real-world entity. |
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