Bitcoin, Digital Signatures, Cryptography, Algorithms, Insights.
security level of 128 bits, for public key cryptographic, the security level equivalency for RSA is 3072 bits for the public modulus; and for ECDSA is 256 bits for the private key. Now if we require the system to have 256 bits of security, the RSA public modulus should be at least 15,360 bits long,