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Traits for Key Encapsulation Mechanisms (KEMs): public-key cryptosystems designed to enable a sender (a.k.a. encapsulator) to generate and encrypt a short secret key and transmit it to a receiver (a.k.a. decapsulator) confidentially
Last release 6 months ago
03 Apr 2026
Ships unpredictably
gaps range from 1 weeks to 1.9 years
Nearly every release is documented
notes for 3 of 3 stable releases
12 versions withdrawn
withdrawn after publishing
6 years old
23 releases · first in 2021
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One column per quarter.
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This release is effectively a complete rewrite of the kem crate. Any similarities between trait names in this release and previous releases is coincid
This release is effectively a complete rewrite of the kem crate. Any similarities between trait
names in this release and previous releases is coincidental. The log below highlights some of the
new parts of the API but will provide an incomplete picture of changes.
Encapsulate and Decapsulate traits (#1509)getrandom feature (#2140)crypto-common (#2222)
crypto-common itself as commonKeyInit, which is useful for seedsKey as the type for representing serialized encapsulation and decapsulation keysInvalidKey as the error when TryKeyInit failsTryDecapsulate trait (#2220, #2235)Kem trait for the whole algorithm type family (#2243)FromSeed trait and Seed type alias (#2284)Decapsulator trait replaced with new implementation ([#2282])Nothing published for this version
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Generic SharedSecret type ([#982])
- Initial release
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