encryption?

Hi, I'm new here . Got a tablet and knew I had WiFi.
I was hoping that I wouldn't have to download an update, and happily
read here,
and figured how to have router 'see' it, simply by restarting the
computer ;-)

As I was reading back posts, I came upon the term "encryption".
It seemed to relate to neighbors being seen on routers?
Mine is a Linksys Wireless-C Broadband with 4 point switch: Model
#WRT54GS Y7
I see several others, probably neighbors , wit identifying account names
but mine has a stronger signal.
Is there something I can do to block them from being on my router? Is
that what 'encrypt' means?
I can't recall that being offered as an option, please advise how to do
it.
(I have had my password for a long time, it's 'tricky' and I'd rather
not change it.)

T.I.A.

Sylvia

 

Sylvia M wrote, On 22/07/2014 10:00:

Just position your wifi access to the mac adress of only your devices.
In addition ...

Shared-key WPA and WPA2 remain vulnerable to password cracking
<http://en.wikipedia.org/wiki/Password_cracking> attacks if users rely
on a weak password or passphrase
<http://en.wikipedia.org/wiki/Password_strength>. To protect against a
brute force attack <http://en.wikipedia.org/wiki/Brute_force_attack>, a
truly random passphrase
<http://en.wikipedia.org/wiki/Random_password_generator> of 20
characters (selected from the set of 95 permitted characters) is
probably sufficient.^[12]
<http://en.wikipedia.org/wiki/Wi-Fi_Protected_Access#cite_note-12> Brute
forcing of simple passwords can be attempted using the Aircrack Suite
<http://en.wikipedia.org/wiki/Aircrack-ng> starting from the four-way
authentication handshake exchanged during association or periodic
re-authentication.

My password is like this sentence:

"I told you that may password is $§£-héhé-=(]-find it"

Yes i know "may" instead of "my"