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PEP is an acronym for "Polymorphic Encryption and Pseudonymization", which hints at its [features](#features) and at the technology on which it is based.
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Functionally, PEP is software for the storage and retrieval of tabular data. PEP's storage consists of a single table. This rather limited [data structure](Data_structure) is offset by some features that run-of-the-mill database systems do not normally provide:
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Functionally, PEP is software for the storage and retrieval of tabular data. PEP's storage consists of a single table. This rather limited [data structure](Data-structure) is offset by some features that run-of-the-mill database systems do not normally provide:
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- PEP [encrypts](#encryption) data both [at rest](https://en.wikipedia.org/wiki/Data_at_rest#Encryption) and in transit, effectively providing [end-to-end encryption](https://en.wikipedia.org/wiki/End-to-end_encryption) between the data's uploader(s) and downloader(s).
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- PEP [ensures](#trust-reduction) that no single server or administrator or hosting party can access the data (or provide access to it) by themselves.
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