How to save public key and private key for ECC?

[Harry]

Hi, all Crypto++ Users,

I used secp160k1 to create a pair of publick/private key into files,
the length for private.key is 408 byte and for public.key is 428 byte.
How can I convert the file into a 160bit length, that is, 20 byte
length string?



This is the code:
char* seed = "1234567890";
        char* privFilename = "Private.key";
                char* pubFilename = "Public.key";

                CryptoPP::ECIES< CryptoPP::ECP >::PrivateKey    PrivateKey;
        CryptoPP::ECIES< CryptoPP::ECP >::PublicKey     PublicKey;
        CryptoPP::AutoSeededRandomPool                  rng;

                rng.Put((byte *)seed, strlen(seed));

                PrivateKey.Initialize( rng, CryptoPP::ASN1::secp160k1() );
        PrivateKey.MakePublicKey( PublicKey );

                CryptoPP::HexEncoder privFile(new 
CryptoPP::FileSink(privFilename));
                PrivateKey.Save(privFile);
                privFile.MessageEnd();

                CryptoPP::HexEncoder pubFile(new 
CryptoPP::FileSink(pubFilename));
                PublicKey.Save(pubFile);
                pubFile.MessageEnd();


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