Data Encryption Strength Calculator

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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.

Encryption Algorithm

AES (Symmetric) RSA (Asymmetric) ECC (Elliptic Curve) DES (Legacy Symmetric) 3DES (Legacy Symmetric) Blowfish (Symmetric)

Key Length (bits)

56-bit 64-bit 112-bit 128-bit 192-bit 256-bit 512-bit 1024-bit 2048-bit 3072-bit 4096-bit

Mode of Operation (Symmetric only)

GCM (Authenticated) CBC CTR ECB (Weak — not recommended) N/A (Asymmetric)

Attacker Compute Power

Consumer PC (~10⁹ keys/sec) Botnet (~10¹² keys/sec) Nation-State (~10¹⁵ keys/sec) Theoretical Quantum (~10¹⁸ keys/sec)

Post-Quantum Threat?

No (Classical Attacker) Yes (Grover / Shor Attack)

Calculate Encryption Strength Results will appear here.

function datUpdateKeyOptions() { var algo = document.getElementById("dat-algorithm").value; var keySelect = document.getElementById("dat-keylen"); var modeSelect = document.getElementById("dat-mode"); var allOptions = keySelect.options;

// Show/hide key options based on algorithm var symmetricKeys = [56, 64, 112, 128, 192, 256, 512]; var rsaKeys = [1024, 2048, 3072, 4096]; var eccKeys = [192, 256, 384, 521]; var desKeys = [56]; var tripleDesKeys = [112, 168]; var blowfishKeys = [32, 64, 128, 256, 448];

var allowed; if (algo === "aes") allowed = [128, 192, 256]; else if (algo === "rsa") allowed = [1024, 2048, 3072, 4096]; else if (algo === "ecc") allowed = [192, 256, 384, 521]; else if (algo === "des") allowed = [56]; else if (algo === "3des") allowed = [112, 168]; else if (algo === "blowfish") allowed = [32, 64, 128, 256, 448]; else allowed = [128, 192, 256];

for (var i = 0; i = 0 ? "" : "none"; } // Set first visible as selected for (var i = 0; i Invalid key length selected."; return; }

// --- Security Bits Calculation --- // For symmetric ciphers: security bits = key length (classical) // For RSA: NIST approximation: security_bits = (1.923 * cbrt(keyLen * ln(2)^(2/3)) * ln(keyLen * ln(2))^(1/3) - 4.69) / ln(2) // Simplified NIST SP 800-57 table mapping used for RSA // For ECC: security_bits = keyLen / 2 (classical)

var securityBits; var algoLabel; var classicalNote = "";

if (algo === "aes") { securityBits = keyLen; // AES-128 → 128 bits, AES-256 → 256 bits algoLabel = "AES"; } else if (algo === "des") { securityBits = 56; algoLabel = "DES"; } else if (algo === "3des") { // 3DES with 3 independent keys: effective security ~112 bits due to meet-in-the-middle securityBits = (keyLen === 168) ? 112 : 80; algoLabel = "3DES"; } else if (algo === "blowfish") { securityBits = keyLen; // Blowfish: security ≈ key length algoLabel = "Blowfish"; } else if (algo === "rsa") { // NIST SP 800-57 Part 1 Rev 5 Table 2 mapping var rsaMap = {1024: 80, 2048: 112, 3072: 128, 4096: 140}; securityBits = rsaMap[keyLen] || Math.round(1.923 * Math.pow(keyLen, 1/3) * Math.pow(Math.log(keyLen), 2/3) / Math.log(2)); algoLabel = "RSA"; } else if (algo === "ecc") { // ECC security = key_length / 2 (Pollard's rho attack) securityBits = Math.floor(keyLen / 2); algoLabel = "ECC"; }

// --- Quantum Adjustment --- // Grover's algorithm halves symmetric key security bits // Shor's algorithm breaks RSA/ECC entirely (security → 0 effectively) var quantumSecurityBits = securityBits; var quantumNote = ""; if (quantum === "yes") { if (algo === "rsa" || algo === "ecc") { quantumSecurityBits = 0; quantumNote = "⚠️ Shor's algorithm renders " + algoLabel + " completely broken under quantum attack. Security bits → 0."; } else { quantumSecurityBits = Math.floor(securityBits / 2); // Grover's algorithm quantumNote = "⚠️ Grover's algorithm reduces symmetric security to " + quantumSecurityBits + " bits (key_length / 2)."; } }

var effectiveBits = (quantum === "yes") ? quantumSecurityBits : securityBits;

// --- Brute-Force Time Calculation --- // Average case: 2^(securityBits - 1) operations // Time (seconds) = 2^(effectiveBits - 1) / attackRate var bruteForceSeconds; var bruteForceLabel;

if (effectiveBits === 0) { bruteForceSeconds = 0; bruteForceLabel = "Instantly broken"; } else { // Use logarithms to avoid overflow: log10(time) = (effectiveBits - 1) * log10(2) - log10(attackRate) var log10Time = (effectiveBits - 1) * Math.log10(2) - Math.log10(attackRate); bruteForceSeconds = Math.pow(10, log10Time);

if (log10Time ⚠️ ECB mode is cryptographically weak: identical plaintext blocks produce identical ciphertext, leaking data patterns. Avoid for any real use."; } else if (mode === "cbc") { modePenalty = "ℹ️ CBC mode is secure when used with a random IV, but does not provide authentication. Consider GCM for authenticated encryption."; } else if (mode === "gcm") { modePenalty = "✅ GCM mode provides both confidentiality and integrity (AEAD). Recommended for modern applications."; }

// --- Key Space --- var log10KeySpace = keyLen * Math.log10(2); var keySpaceStr = "2^" + keyLen + " ≈ 10^" + log10KeySpace.toFixed(1);

// --- Output --- var html = "### Encryption Strength Analysis "; html += ""; html += "Algorithm" + algoLabel + (mode !== "na" ? " (" + mode.toUpperCase() + " mode)" : "") + ""; html += "Key Length" + keyLen + " bits"; html += "Key Space" + keySpaceStr + " possible keys"; html += "Classical Security" + securityBits + " bits"; if (quantum === "yes") { html += "Post-Quantum Security" + quantumSecurityBits + " bits"; } html += "Effective Security Bits" + effectiveBits + " bits"; html += "Brute-Force Time (avg)" + bruteForceLabel + ""; html += "Strength Rating" + rating + ""; html += ""; html += "" + ratingDesc + "

"; if (modePenalty) html += "" + modePenalty + "

"; if (quantumNote) html += "" + quantumNote + "

";

document.getElementById("dat-result").innerHTML = html; }

// Initialize key options on load datUpdateKeyOptions();

#### 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

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