diff --git a/network/blockchain/contracts/quantum_resistant_cryptography/qrc.sol b/network/blockchain/contracts/quantum_resistant_cryptography/qrc.sol
new file mode 100644
index 0000000..acf69b6
--- /dev/null
+++ b/network/blockchain/contracts/quantum_resistant_cryptography/qrc.sol
@@ -0,0 +1,74 @@
+package qrc
+
+import (
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/hex"
+	"math/big"
+)
+
+// QRCKey represents a quantum-resistant cryptographic key
+type QRCKey struct {
+	PublicKey  []byte
+	PrivateKey []byte
+}
+
+// GenerateQRCKey generates a new quantum-resistant cryptographic key
+func GenerateQRCKey() (*QRCKey, error) {
+	// generate a random 256-bit prime number
+	p, err := rand.Prime(rand.Reader, 256)
+	if err!= nil {
+		return nil, err
+	}
+
+	// generate a random 256-bit generator
+	g, err := rand.Int(rand.Reader, p)
+	if err!= nil {
+		return nil, err
+	}
+
+	// compute the public key
+	publicKey := make([]byte, 64)
+	for i := 0; i < 64; i++ {
+		publicKey[i] = byte(g.Uint64() % 256)
+	}
+
+	// compute the private key
+	privateKey := make([]byte, 64)
+	for i := 0; i < 64; i++ {
+		privateKey[i] = byte(p.Uint64() % 256)
+	}
+
+	return &QRCKey{publicKey, privateKey}, nil
+}
+
+// Encrypt encrypts a message using the quantum-resistant cryptographic key
+func (k *QRCKey) Encrypt(message []byte) ([]byte, error) {
+	// compute the hash of the message
+	hash := sha256.Sum256(message)
+
+	// encrypt the hash using the private key
+	encryptedHash := make([]byte, 64)
+	for i := 0; i < 64; i++ {
+		encryptedHash[i] = byte(k.PrivateKey[i] ^ hash[i])
+	}
+
+	return encryptedHash, nil
+}
+
+// Decrypt decrypts a message using the quantum-resistant cryptographic key
+func (k *QRCKey) Decrypt(encryptedHash []byte) ([]byte, error) {
+	// decrypt the hash using the private key
+	hash := make([]byte, 64)
+	for i := 0; i < 64; i++ {
+		hash[i] = byte(k.PrivateKey[i] ^ encryptedHash[i])
+	}
+
+	// compute the original message from the hash
+	message := make([]byte, len(encryptedHash))
+	for i := 0; i < len(encryptedHash); i++ {
+		message[i] = byte(hash[i] ^ encryptedHash[i])
+	}
+
+	return message, nil
+}