diff options
| -rw-r--r-- | library/core/src/hint.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/library/core/src/hint.rs b/library/core/src/hint.rs index 394a3ea6778..cb83540c4ea 100644 --- a/library/core/src/hint.rs +++ b/library/core/src/hint.rs @@ -320,6 +320,10 @@ pub fn spin_loop() { /// This also means that this function does not offer any guarantees for cryptographic or security /// purposes. /// +/// This limitation is not specific to `black_box`; there is no mechanism in the entire Rust +/// language that can provide the guarantees required for constant-time cryptography. +/// (There is also no such mechanism in LLVM, so the same is true for every other LLVM-based compiler.) +/// /// </div> /// /// [`std::convert::identity`]: crate::convert::identity |