Security

Signing, Integrity, And Encryption

Code signing, SRI, hashes, trusted origins, and what browsers actually validate.

securityintegritysigningstable

Browsers validate WebAssembly structure and types, but they do not require native-style code signing for every module. Applications that distribute WASM can add integrity and authenticity checks.

Subresource Integrity can pin expected hashes for fetched resources in supported loading patterns.
Application-level signatures can verify a trusted publisher before instantiation.
Encryption hides content from parties without keys; it does not prove who produced the code.
HTTPS, trusted origins, content hashes, and strict MIME/content-type handling are the baseline.

References

MDN JavaScript interface