Elliptic Curve Cryptography Calculator
Calculate ECC key strength, equivalent RSA key length, security level, and cryptographic parameters.
Inputs
bits
Results
Key Length
256 bits
Equivalent RSA Key Length
512 bits
Security Level
128 bits
Size Advantage over RSA
2×
Brute Force Time0 years
How to Use This Calculator
- Select the elliptic curve (P-256, P-384, P-521, Curve25519).
- Enter the private key value for computation.
- Review the public key point coordinates and equivalent symmetric security level.
- Compare the bit-equivalent security to RSA key lengths for the same protection level.
- Use NIST P-256 or Curve25519 for most applications -- they offer 128-bit equivalent security.
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Formula
ECC Security ≈ Key Length / 2Related Calculators
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