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memguard-rs
A Rust library that provides secure memory handling primitives including zeroization on drop, memory locking, constant-time comparison, and compile-time guarded regions, with zero dependencies and no_std support.
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131
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License
Apache-2.0
Last updated
2026-07-22
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FR-AI / ANALYSISWhy it is worth attention
It offers a comprehensive, safe, and dependency-free toolkit for protecting sensitive data in memory, combining multiple essential primitives (zeroization, mlock, constant-time, guarded regions) in one crate while remaining no_std compatible.
Who it is for
- Rust developers handling cryptographic secrets or authentication tokens
- Developers building security-sensitive applications (e.g., password managers, key stores)
- Embedded systems developers working in no_std environments
- Security auditors and maintainers who need minimal dependency audit surface
Use cases
- Zeroizing cryptographic keys and secrets when they go out of scope to prevent memory leaks
- Locking memory pages to prevent secrets from being swapped to disk
- Performing timing‑side-channel‑resistant equality checks on MACs or tokens
- Managing fixed‑size, locked memory regions for secure buffers in embedded or kernel‑adjacent code
Strengths
- Zero dependencies – no transitive dependency surface to audit
- no_std compatible – core primitives work without an allocator or standard library
- Safe public API – all unsafe code is internal and encapsulated behind safe abstractions
- Multiple essential primitives: zeroization, memory locking, constant‑time comparison, and compile‑time sized guarded regions
Considerations
- Memory locking (mlock/VirtualLock) requires the `std` feature and is not available in no_std mode
- Minimum supported Rust version is 1.65 and may be bumped in minor releases without warning
- The crate is at version 0.1 and may lack production‑ready hardening or audit coverage
README quick start
Quick start
Description
Secure memory handling primitives for Rust — zeroization on drop, mlock-protected regions, constant-time comparison, and compile-time enforced memory safety boundaries
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