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Calcimator

Security Strength Calculator

Calculate overall cryptographic security strength, equivalent key lengths, and security lifetime estimates.

Inputs

bits
bits
bits

Results

Overall Security Level

128 bits

Security Lifetime

16,777,216 years

Symmetric Security128 bits
Asymmetric Security1,024 bits
Hash Security128 bits
Equivalent RSA Key3,072 bits
How to Use This Calculator
  1. Enter the algorithm type (symmetric, asymmetric, hash) and key or parameter size.
  2. Set the compliance framework: NIST, FIPS 140-3, or CNSA Suite.
  3. Review the security strength rating in bits.
  4. Flag any algorithm below 112-bit security for immediate deprecation planning.
  5. Use the output to compile a cryptographic inventory for compliance audits.

How the result changes with Symmetric Key Length

Symmetric Key LengthOverall Security LevelSecurity Lifetime
109109 bits23,170.5 years
221128 bits16,777,216 years
355128 bits16,777,216 years
467128 bits16,777,216 years

What each input means

Symmetric Key Length
Symmetric encryption key length (AES, etc.)
Asymmetric Key Length
Asymmetric key length (RSA, etc.)
Hash Length
Hash function output length

How this is calculated

Formula

Overall Security = min(Symmetric, Asymmetric, Hash)

Worked example, using the default values

  1. Identify Input Parameters
    Symmetric Key Length = 128, Asymmetric Key Length = 2048, Hash Length = 256 = 3 input(s) provided
  2. Calculate Overall Security Level
    Overall Security Level
    128 = 128
  3. Calculate Security Lifetime
    Security Lifetime
    16777216 = 16777216
  4. Calculate Symmetric Security
    Symmetric Security
    128 = 128
  5. Calculate Asymmetric Security
    Asymmetric Security
    1024 = 1024

Engine last updated . Checked against 3 independently-derived tests — how we verify calculators.

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