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We need to be prepared with the tools needed for secure communications. 
Downloading these libraries acts as safeguard for privacy, as we will always be able to build and disribute encrypted applications.
And if you're really paranoid, you'll back up a favorite Linux distro, browser and compiler.

* Crypto++ - https://github.com/weidai11/cryptopp
* Botan - https://github.com/randombit/botan
* BouncyCastle Java - https://github.com/bcgit/bc-java
* BouncyCastle C# - https://github.com/bcgit/bc-csharp
* GnuTLS - https://gitlab.com/gnutls/gnutls
* NaCl - https://nacl.cr.yp.to/install.html

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package main

// Code modified from: https://github.com/abdullah2993/go-runpe/blob/master/runpe.go

import (
	"bytes"
	"debug/pe"
	"encoding/binary"
	"fmt"
	"syscall"

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package anon.app.core.security;

import anon.market.core.Log;
import org.bouncycastle.crypto.engines.AESEngine;
import org.bouncycastle.crypto.generators.SCrypt;
import org.bouncycastle.crypto.modes.GCMBlockCipher;
import org.bouncycastle.crypto.params.AEADParameters;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.jcajce.provider.digest.SHA3;
import javax.ws.rs.WebApplicationException;

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REGO is a declarative language used for policy-as-code in the Open Policy Agent (OPA) framework. Here's a concise cheat sheet of popular built-in functions, syntax idioms, and variables in REGO:

1. Built-in functions:

- Comparison: `eq(x, y)`, `lt(x, y)`, `lte(x, y)`, `gt(x, y)`, `gte(x, y)`
- Arithmetic: `add(x, y)`, `sub(x, y)`, `mul(x, y)`, `div(x, y)`, `mod(x, y)`
- Logical: `and(x, y)`, `or(x, y)`, `not(x)`
- Type Checking: `is_number(x)`, `is_string(x)`, `is_boolean(x)`, `is_array(x)`, `is_set(x)`, `is_object(x)`, `is_null(x)`
- Casting: `to_number(x)`, `to_string(x)`, `to_boolean(x)`
- Arrays: `count(arr)`, `all(arr, func)`, `any(arr, func)`, `filter(arr, func)`, `map(arr, func)`, `reduce(arr, func, initial)`