For wifi the Max password length is 63 characters. When I choose such a long password will this lead to notably higher power consumption of the network device (router, smartphone, …)? I would guess that the longer the password the more effort is required for cryptographic operations applied to the transmitted data which leads to higher power consumption. Is this true? And is the increased power consumption noticable when using a very long password (like 60 chars for example)?
WiFi Power Consumption – Is It Related to Password Length?
ieee 802.11power
Related Solutions
Consider looking into PacketFence(.org) + FreeRADIUS.
PacketFence describes itself as :
PacketFence is a fully supported, trusted, Free and Open Source network access control (NAC) solution. Boasting an impressive feature set including a captive-portal for registration and remediation, centralized wired and wireless management, powerful BYOD management options, 802.1X support, layer-2 isolation of problematic devices; PacketFence can be used to effectively secure networks small to very large heterogeneous networks.
(Emphasis mine.)
When users first attempt to connect to the network, you can require that they authenticate using a username and password, as shown in this example image from PF's website : http://www.packetfence.org/typo3temp/pics/3623b54ba0.png
As for (Free)RADIUS, PacketFence's administration guide has this to say :
In some occasions, a RADIUS server is mandatory in order to give access to the network. For example, the usage of WPA2-Enterprise (Wireless 802.1X), MAC authentication and Wired 802.1X all requires a RADIUS server to authenticate the users and the devices, and then to push the proper VLAN to the network equipment. We strongly recommend that you install FreeRADIUS even if you plan not to use the feature now.
Unfortunately I can't exactly include a whole configuration guide in this answer, but there is good documentation available on the PacketFence site.
Best of luck !
Power consumption on Cisco's new 3650 platform is very variable. It all depends on traffic flow, PoE and utilization of ports on the switch model. Cisco has made a Power Consumption table, which shows different usage for different scenarios. It's available via the provided link. Picture is for future reference. Remember to add your inline power of Access points, IP phones or cameras.
It is not possible to show the live power consumption via IOS.
Source: Look for table 12
Best Answer
No. The password isn't used in literal. PBKDF2 is used on the password (with the SSID as salt and 4096 rounds of SHA1) to produce 64 hexadecimal digits = 256 bits, which are then used to derive the actual encryption key. Since that happens only once the password length has no impact.