cvechecker reports about possible vulnerabilities on your system by scanning the installed software and matching the results with the CVE database. This is not a bullet-proof method and you will most likely have many false positives, but it is still better than nothing, especially if you are running a distribution with little security coverage.
With hex2passwd, you can generate passwords that are relatively random yet still based on mnemonics. Because its output looks random, attackers will have more difficulty finding the mnemonic you use. Because the tool always generates the same password, you can use it to create all passwords you require.