5 calculators in this category
- Password Entropy CalculatorNIST SP 800-63BEntropy measures how many equally likely passwords an attacker has to search, expressed as a power of two. A password drawn…
- Password Crack Time CalculatorOWASP Password Storage Cheat SheetAn offline brute-force attack is arithmetic, not magic. The attacker searches a keyspace of C L candidates at a rate set by the…
- Encryption Key Brute Force Time CalculatorNIST SP 800-57 Part 1 Rev. 5A symmetric key of k bits has 2 k possible values, and an exhaustive search finds the right one after half of them on average…
- Hash Collision Probability CalculatorBirthday bound; NIST SP 800-107 Rev. 1A hash or random identifier of b bits has 2 b possible values, but duplicates appear far sooner than that suggests. The…
- CVSS v3.1 Base Score CalculatorCVSS v3.1, FIRST.orgThe CVSS base score expresses the intrinsic severity of a vulnerability on a 0.0 to 10.0 scale, using eight metrics that…
Which one do you need?
- Password Entropy Calculator
- Calculate bits of entropy and total keyspace for a random password or Diceware passphrase from its length and alphabet, and test it against a policy target.
- Password Crack Time Calculator
- Estimate offline brute-force time for a password from its length, alphabet, the attacker's hash rate, GPU count and the KDF work factor, in seconds to years.
- Encryption Key Brute Force Time Calculator
- Work out the keyspace of a symmetric key, the expected time to exhaust it at a given attack rate, the energy and money it would take, and the quantum-adjusted strength.
- Hash Collision Probability Calculator
- Apply the birthday bound to any digest or random ID: collision probability for n values, the n at 50% risk, the n at your own threshold, and the bit length you need.
- CVSS v3.1 Base Score Calculator
- Compute a CVSS v3.1 base score from the eight base metrics, with impact and exploitability sub-scores, the severity rating and the full vector string.