Transaction Signing
Definition
Transaction signing is the process of creating a cryptographic signature that authorizes a blockchain transaction. The signature proves that the transaction creator possesses the private key for the sending address, preventing unauthorized fund transfers.
Technical Explanation
Signing takes the transaction data (inputs, outputs, amounts) and the private key as inputs, producing a signature that cryptographically binds the key to the transaction. The signing algorithm is deterministic—the same inputs always produce the same signature—yet the signature cannot be created without the private key.
Post-quantum transaction signing uses algorithms like SPHINCS+ that resist quantum attacks. The signing process is similar but produces larger signatures and may take slightly longer. Security comes from mathematical problems that remain hard for quantum computers.
SynX Relevance
SynX transactions are signed with SPHINCS+-SHAKE-128f. Your wallet constructs the transaction, signs it locally with your spending key, and broadcasts only the signed transaction. The private key never leaves your device, and the signature provides quantum-resistant proof of authorization.
Frequently Asked Questions
- How long does SynX transaction signing take?
- SPHINCS+ signing completes in 10-50 milliseconds—imperceptible to users.
- Is my private key exposed during signing?
- Never. Signing happens locally on your device; only the signature is transmitted.
- Can a signed transaction be modified?
- No. Any change to the transaction invalidates the signature.
Quantum-secure authorization for every transfer. Sign with SynX