No repudio en ledgers distribuidos: Firmas digitales ECDSA P-256
Los secretos compartidos son un antipatrón en sistemas de ledger distribuido. wFabricSecurity impone criptografía de clave pública con ECDSA P-256 para un no repudio total. Día 02 de la serie técnica wFabricSecurity Open Source. Los Problemas Reales Transmitir payloads JSON sin firmar en redes internas vulnerables a manipulación MITM Incapacidad de probar qué worker off-chain originó una mutación…
Distribuidos ledgers lack repudiability, but wFabricSecurity addresses this with strong cryptographic measures. The framework enforces public key cryptography using ECDSA P-256 to provide total non-repudiation. The technical series, starting day 02, focuses on real world issues including transmitting unsigned JSON payloads over vulnerable internal networks, proving the origin of malicious off-chain modifications, and incompatibilities between Python and Fabric microservice peers' signature formats.
The implementation issues an identity and registers it, then signs payloads with the node's private key. The recipient peer verifies the ECDSA signature to confirm the payload originated exactly from the signer. The architecture benefits from NIST P-256 standards compatibility, fast ECDSA bindings with native cryptography engine, and proven verification within Hyperledger Fabric environments.
It supports Python 3.10+ with cryptographic identity management, code integrity hashing and token-bucket rate limiting. More information is available on GitHub and PyPI from the author, William Steve Rodríguez Villamizar.
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