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The Hydrogen library is a small, easy-to-use, hard-to-misuse cryptographic
library.
Features:
- Consistent high-level API, inspired by libsodium. Instead of low-level
primitives, it exposes simple functions to solve common problems that
cryptography can solve.
- 100% built using just two cryptographic building blocks: the Curve25519
elliptic curve, and the Gimli permutation.
- Small and easy to audit. Implemented as one tiny file for every set of
operation, and adding a single .c file to your project is all it takes to use
libhydrogen in your project.
- The whole code is released under a single, very liberal license (ISC).
- Zero dynamic memory allocations and low stack requirements (median: 32 bytes,
max: 128 bytes). This makes it usable in constrained environments such as
microcontrollers.
- Portable: written in standard C99. Supports Linux, *BSD, MacOS, Windows, and
the Arduino IDE out of the box.
- Can generate cryptographically-secure random numbers, even on Arduino boards.
- Attempts to mitigate the implications of accidental misuse, even on systems
with an unreliable PRG and/or no clock.
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