Encrypting and decrypting strings in vb.net

I am in need of a proficient programmer to encrypt and decrypt strings in vb.net using 3des. I chose this cryptographic technique for its high level of encryption strength. The purpose of the encryption is to ensure maximum data security. I need someone with hands on experience in the field and the ability to deliver timely results. The project would also require thorough testing and debugging at the end of its development phase. Thanks for your time.