Java Encryption

Java Encryption

Java runs everywhere the JVM goes: Android apps, big enterprise backends, Spring services, and chunky desktop tools. The language trades bare-metal speed for portability and a huge library ecosystem. String handling is UTF-16 based on the JVM, which shapes how text sits in your bytecode.

JARs and class files are straightforward to open; strings for API keys, HMAC salts, and licence checks often appear verbatim. Moving those into encrypted form and decrypting on first use makes grepping your artefact a little less rewarding. StringEncrypt emits Java that matches the Unicode or byte-style flow you pick—see the examples below.

String encryption supports both UNICODE and ANSI strings.

For even more protection you can still use dedicated Java obfuscators.

You can read more about Java and Java strings at:

Java encryption (UNICODE Example)

Plaintext reference: StringEncrypt sample

// encrypted with https://www.stringencrypt.com (v1.5.0) [Java]
// myString = "StringEncrypt sample"
String myString = "";

int OkAth[] = { 0x726B, 0x5E6D, 0x6E34, 0xE4B2, 0xF467, 0x81F0, 0xA716, 0xA51A,
                0x884F, 0x423D, 0xB54D, 0x6F25, 0xB331, 0xC3AE, 0x0343, 0xCDD9,
                0xA637, 0x471E, 0x49DB, 0xA794 };

for (int QaAPk = 0, Smzcr = 0; QaAPk < 20; QaAPk++)
{
	Smzcr = OkAth[QaAPk];
	for (int zwDlq = 0; zwDlq < 2; zwDlq++)
	{
		Smzcr = (Smzcr ^ 0xCD43) & 0xFFFF;
		Smzcr = ((Smzcr & 0xFFFF) - 1) & 0xFFFF;
	}
	Smzcr = ((Smzcr & 0xFFFF) - 0xCB0A) & 0xFFFF;
	Smzcr = (Smzcr ^ ((Smzcr & 0xFFFF) >>> 8)) & 0xFFFF;
	Smzcr = (((Smzcr & 0xFFFF) >>> (QaAPk % 16)) | ((Smzcr & 0xFFFF) << (16 - (QaAPk % 16)))) & 0xFFFF;
	Smzcr = ((Smzcr & 0xFFFF) + 1) & 0xFFFF;
	for (int aNzYm = 0; aNzYm < 4; aNzYm++)
	{
		for (int hNkYz = 0; hNkYz < 4; hNkYz++)
		{
			for (int wtFpn = 0; wtFpn < 4; wtFpn++)
			{
				Smzcr = (Smzcr ^ ((Smzcr & 0xFFFF) >>> 12)) & 0xFFFF;
			}
		}
		Smzcr = (((Smzcr & 0xFFFF) << (QaAPk % 16)) | ((Smzcr & 0xFFFF) >>> (16 - (QaAPk % 16)))) & 0xFFFF;
	}
	Smzcr = (Smzcr ^ ((Smzcr & 0xFFFF) >>> 9)) & 0xFFFF;
	Smzcr = (Smzcr ^ (((Smzcr & 0xFFFF) << 9) & 0xFFFF)) & 0xFFFF;
	Smzcr = (Smzcr ^ 0xFFFF) & 0xFFFF;
	for (int NLYyd = 0; NLYyd < 3; NLYyd++)
	{
		for (int OhXcR = 0; OhXcR < 2; OhXcR++)
		{
			for (int CpYHz = 0; CpYHz < 4; CpYHz++)
			{
				Smzcr = (Smzcr ^ 0x2A7A) & 0xFFFF;
			}
		}
	}
	for (int axEPV = 0; axEPV < 3; axEPV++)
	{
		Smzcr = (((Smzcr & 0xFFFF) >>> (QaAPk % 16)) | ((Smzcr & 0xFFFF) << (16 - (QaAPk % 16)))) & 0xFFFF;
		Smzcr = (Smzcr ^ ((Smzcr & 0xFFFF) >>> 15)) & 0xFFFF;
	}
	for (int ejban = 0; ejban < 4; ejban++)
	{
		Smzcr = (Smzcr ^ 0xFFFF) & 0xFFFF;
		Smzcr = ((Smzcr & 0xFFFF) + QaAPk) & 0xFFFF;
		for (int BiDyT = 0; BiDyT < 3; BiDyT++)
		{
			for (int rTUyY = 0; rTUyY < 2; rTUyY++)
			{
				Smzcr = (Smzcr ^ QaAPk) & 0xFFFF;
				Smzcr = (((Smzcr & 0xFFFF) >>> (QaAPk % 16)) | ((Smzcr & 0xFFFF) << (16 - (QaAPk % 16)))) & 0xFFFF;
			}
		}
	}
	myString = myString + (char)(Smzcr & 0xFFFF);
}

Java encryption (ANSI Example)

Plaintext reference: StringEncrypt sample

// encrypted with https://www.stringencrypt.com (v1.5.0) [Java]
// myString = "StringEncrypt sample"
String myString = "";

int ducIO[] = { 0xC1, 0x40, 0x8E, 0x6E, 0x9A, 0xA1, 0xD5, 0x2A,
                0x2B, 0x5B, 0x0B, 0x3B, 0x0E, 0x31, 0x03, 0xCB,
                0xAB, 0x59, 0x58, 0xD3 };

for (int akjNo = 0, WCydJ = 0; akjNo < 20; akjNo++)
{
	WCydJ = ducIO[akjNo];
	for (int yzqFu = 0; yzqFu < 4; yzqFu++)
	{
		for (int oRKnE = 0; oRKnE < 4; oRKnE++)
		{
			for (int hHlWj = 0; hHlWj < 4; hHlWj++)
			{
				WCydJ = ((WCydJ & 0xFF) + 1) & 0xFF;
				WCydJ = (WCydJ ^ 0xFF) & 0xFF;
			}
			for (int JNhCI = 0; JNhCI < 4; JNhCI++)
			{
				WCydJ = ((WCydJ & 0xFF) + 0x38) & 0xFF;
				WCydJ = (WCydJ ^ 0x3F) & 0xFF;
			}
			WCydJ = (((~(WCydJ & 0xFF)) & 0xFF) + 1) & 0xFF;
		}
		WCydJ = (WCydJ ^ 0x90) & 0xFF;
	}
	WCydJ = ((WCydJ & 0xFF) - 1) & 0xFF;
	WCydJ = ((WCydJ & 0xFF) + 1) & 0xFF;
	WCydJ = (((WCydJ & 0xFF) << (akjNo % 8)) | ((WCydJ & 0xFF) >>> (8 - (akjNo % 8)))) & 0xFF;
	for (int plMkX = 0; plMkX < 3; plMkX++)
	{
		WCydJ = ((WCydJ & 0xFF) + 0x45) & 0xFF;
		for (int yRgwE = 0; yRgwE < 2; yRgwE++)
		{
			WCydJ = (((WCydJ & 0xFF) << 5) | ((WCydJ & 0xFF) >>> 3)) & 0xFF;
			WCydJ = (WCydJ ^ ((WCydJ & 0xFF) >>> 6)) & 0xFF;
			WCydJ = (((~(WCydJ & 0xFF)) & 0xFF) + 1) & 0xFF;
		}
		WCydJ = ((WCydJ & 0xFF) - akjNo) & 0xFF;
	}
	WCydJ = ((WCydJ & 0xFF) + 1) & 0xFF;
	WCydJ = (((WCydJ & 0xFF) >>> 4) | ((WCydJ & 0xFF) << 4)) & 0xFF;
	WCydJ = ((WCydJ & 0xFF) + 1) & 0xFF;
	for (int RsKEN = 0; RsKEN < 4; RsKEN++)
	{
		for (int vyMCf = 0; vyMCf < 4; vyMCf++)
		{
			WCydJ = (WCydJ ^ ((WCydJ & 0xFF) >>> 5)) & 0xFF;
			for (int EeOSj = 0; EeOSj < 3; EeOSj++)
			{
				WCydJ = (((WCydJ & 0xFF) >>> 4) | ((WCydJ & 0xFF) << 4)) & 0xFF;
			}
			WCydJ = ((WCydJ & 0xFF) - 1) & 0xFF;
		}
		WCydJ = (((WCydJ & 0xFF) >>> (akjNo % 8)) | ((WCydJ & 0xFF) << (8 - (akjNo % 8)))) & 0xFF;
		for (int DwgCx = 0; DwgCx < 4; DwgCx++)
		{
			WCydJ = ((WCydJ & 0xFF) + 1) & 0xFF;
			WCydJ = ((WCydJ & 0xFF) - akjNo) & 0xFF;
		}
	}
	for (int jNDVc = 0; jNDVc < 2; jNDVc++)
	{
		for (int oInaF = 0; oInaF < 3; oInaF++)
		{
			for (int rkiFq = 0; rkiFq < 4; rkiFq++)
			{
				WCydJ = (((WCydJ & 0xFF) >>> (akjNo % 8)) | ((WCydJ & 0xFF) << (8 - (akjNo % 8)))) & 0xFF;
				WCydJ = (WCydJ ^ akjNo) & 0xFF;
				WCydJ = ((WCydJ & 0xFF) + akjNo) & 0xFF;
			}
		}
		WCydJ = (((WCydJ & 0xFF) << 7) | ((WCydJ & 0xFF) >>> 1)) & 0xFF;
		WCydJ = ((WCydJ & 0xFF) - 0xF2) & 0xFF;
	}
	WCydJ = (WCydJ ^ 0xFF) & 0xFF;
	myString = myString + (char)(WCydJ & 0xFF);
}