WPA encryption Key Generator
However, the user only ever specifies a key of either 40 or 104 binary bits. Since WEP keys should always be specified in their hexadecimal form to guarantee device interaction, and since each hex digit represents 4 binary bits of the key, 40 and 104 bit keys are represented by 10 and 26 hex digits respectively. A tool to generate a PSK for IPSec without requiring either party to send it to the other party. Toggle navigation. IFM - IPSec Pre-shared Key (PSK) Generator. WPA / WPA2 key generator. A string of 64 hexadecimal digits. Download keys Generate a new encryption keys. Read: Security & Insecurity in pre-shared key mode. A wireless network with WPA-PSK encryption requires a passphrase (the pre-shared key) to be entered to get access to the network.Most wireless drivers accept the passphrase as a string of at most 63 characters, and internally convert the passphrase to a 256-bit key.
Create a WPA Key
This tool generate a WPA encryption key that you can use to secure your Wireless network. generate the WPA Encryption key, copy it and paste it into your wireless router's configuration panel. Restart your DSL modem/router.
Check the WEP Key generator
In short, it generates 2 keys: one private and one public. 
The public key will be signed by a, and the result is a digital certificate (which can be in a CRT file)My point is: if you have a CRT file (aka certificate), it means a key pair was already generated and signed by a Certification Authority. There's no way to generate a new key from it (because it already has a key).If you want to get the public key that's inside the certificate, you must read it using openssl x509 command.
Wi-Fi Protected Access
Wi-Fi Protected Access (WPA and WPA2) are systems to secure wireless (Wi-Fi) networks. They were created in response to several serious weaknesses researchers had found in the previous system, Wired Equivalent Privacy (WEP). WPA implements the majority of the IEEE802.11i standard, and was intended as an intermediate measure to take the place of WEP while 802.11i was prepared. WPA is designed to work with all wireless network interface cards, but not necessarily with first generation wireless access points. WPA2 implements the full standard, but will not work with some older network cards. Both provide good security, with two significant issues:
- either WPA or WPA2 must be enabled and chosen in preference to WEP. WEP is usually presented as the first security choice in most installation instructions.
- in the 'Personal' mode, the most likely choice for homes and small offices, a passphrase is required that, for full security, must be longer than the typical 6 to 8 character passwords users are taught to employ.
WPA is designed for use with an 802.1X authentication server, which distributes different keys to each user; however, it can also be used in a less secure 'pre-shared key' (PSK) mode, where every user is given the same passphrase. The Wi-Fi Alliance calls the pre-shared key version WPA-Personal or WPA2-Personal and the 802.1X authentication version WPA-Enterprise or WPA2-Enterprise.
Source: Wikipedia