About SPHINCS+ Verification

This FIPS 205-compliant tool supports verification of SPHINCS+ SHAKE signatures (128f, 192f, 256f) for quantum-resistant digital signatures.

Verify Your Quantum-Safe SPHINCS+ Signature

Use this tool to check SPHINCS+ SHAKE signatures (128f, 192f, or 256f). Verify any file type - images, PDFs, videos, documents, etc. - by entering the public key, signed data, and signature below. Paste text (up to 1KB) or upload files (up to 6MB).

Public Key (64, 96, or 128 hex characters):

Or upload public key file (max 1KB):

Signed Data (max 1KB if pasted):

Or upload data file (max 6MB, any type - images, PDFs, videos, etc.):

Signature (hexadecimal):

Or upload signature file (max ~100KB):

SPHINCS+ Variant (determined by key length):
128f 192f 256f