Data Encryption Strength Calculator
Evaluate the theoretical strength of an encryption configuration based on algorithm type, key length, and operational context. Results are expressed in bits of security and estimated brute-force resistance.
Results will appear here.
Formulas Used
Symmetric (AES, DES, Blowfish):
Security Bits = Key Length (classical)
Security Bits (Grover) = Key Length / 2
RSA:
Security Bits ≈ NIST SP 800-57 Table 2 mapping
(e.g., 2048-bit RSA → 112 bits of security)
Security Bits (Shor's) = 0 (completely broken)
ECC:
Security Bits = Key Length / 2 (Pollard's rho)
Security Bits (Shor's) = 0 (completely broken)
Brute-Force Time:
T = 2^(SecurityBits − 1) / AttackRate
(Average case: half the key space searched)
Key Space:
K = 2^(KeyLength)
Assumptions & References
- Security bit estimates follow NIST SP 800-57 Part 1 Rev 5 (2020).
- RSA security bits use the General Number Field Sieve (GNFS) sub-exponential complexity model.
- ECC security uses Pollard's rho algorithm: O(2^(n/2)) complexity.
- Grover's quantum algorithm provides a quadratic speedup against symmetric ciphers, halving effective key length.
- Shor's quantum algorithm solves integer factorization and discrete logarithm in polynomial time, breaking RSA and ECC.
- 3DES effective security is 112 bits (not 168) due to the meet-in-the-middle attack on 3-key 3DES.
- ECB mode weakness is independent of key length — it is a structural flaw in the mode, not the cipher.
- Brute-force time assumes average case (2^(n−1) operations) at the selected attacker compute rate.
- NIST recommends ≥ 128 bits of security for data protected beyond 2030.
- References: NIST SP 800-57, NIST SP 800-131A, ECRYPT-CSA D5.4 (2018), NSA CNSA Suite.