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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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- PEP [pseudonymizes data](Pseudonymization) to prevent multiple downloaders from blending data into a larger data set.
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- PEP [keeps previous data](#retention) versions available after a cell's contents are overwritten.
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- PEP [keeps previous data](Data-structure#retention) versions available after a cell's contents are overwritten.
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Because of these features, PEP is usable for the storage of any (sensitive and/or confidential) information that must be made available in a pseudonymized form, and/or that must be kept available in multiple versions that may exist over time. Its current applications include the storage and dissemination of medical data for multiple academic research projects. Because of this, some of PEP's [terminology](Glossary) is geared toward such use.
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