Hands-on

The toolkit.

Six working tools that do the real thing, not a demo. Each one reinforces a lesson: identify a hash, break a cipher, weigh a password, score a vulnerability, carve a subnet, and look up a port. Everything runs in your browser.

CryptoHash identifier
Length
Best guess
Also could be

Length and prefix reveal the algorithm. See lesson 00.5.

CryptoCipher lab
0
Caesar
ROT13
Atbash
Base64 dec

Do not know the shift? Brute force all 25 and read the plain one:

IdentityPassword analyzer
Length
Char pool
Entropy
Verdict
Offline crack

Entropy assumes random. Real passwords are worse. Crack time assumes 100 billion guesses/sec, an offline attack from lesson 02.6. Runs locally, nothing is sent.

ReportingCVSS 3.1 base score
0.0 None

The real CVSS 3.1 base formula. Severity ratings feed the report in lesson 02.10.

NetworkingSubnet calculator
Netmask
Network
Broadcast
Host range
Usable hosts

IP addressing from lesson 00.4. Each octet is one byte, from lesson 00.1.

ReferencePorts & HTTP codes
KeyMeaningSecurity note

The essentials from lessons 00.4 and 00.7.