Security conference needs unique logo that stands out for the 7th year!

RVAsec

We are an annual computer security conference, and this is our 7th year. We attract all sorts of people that are in the information security industry including management, risk professionals and very technical engineers.

The conference does not have a theme this year. But we are looking for an Emblem Style logo that will be on the website and also on shirts/bags/etc.
For some ideas since it is the 7th year, we were thinking some of the following might be good:
-Lucky 7
-Gambling
-7 samurai
-Seven is the sum of any two opposite sides on a standard six-sided die.
-The Disney film Snow White and the Seven Dwarfs
-007 aka spy theme ... RVAsec 007
-Star Trek: Voyager features a character named Seven of Nine.
-Se7en, also just called Seven, is a 1995 movie about a serial killer basing his murders and victims on the seven deadly sins.
-The Seven Rings of the Vongola Family in Katekyo Hitman Reborn: Sky, Storm, Rain, Sun, Thunder, Mist, and Cloud.
-7 days of the week
-7/11
-7 Up
-7 Seas
-In the One Piece series, the Shichibukai (literally, "Seven Military Seas", known in the English versions as the "Seven Warlords of the Sea") are seven powerful pirates who work for the government.

https://en.wikipedia.org/wiki/7#Med…ertainment

You can see or colors at rvasec.com

Be creative as we are open to any idea!