The (in)security of proprietary cryptography

摘要: Proprietary cryptography is a term used to describe custom encryption techniques that are kept secret by its designers add additional security. It questionable if such an approach increases the cryptographic strength of underlying mathematical algorithms. The security proprietary encryption techniques relies entirely on competence semi - conductor companies, which keep technical description strictly confidential after designing. It is difficult give public and independent assessment the cryptography, without having access detailed information design. The first part this dissertation dedicated introduction the general field computer cryptography. includes extensive theoretical background refers related literature gives summary well known at tack techniques. Additionally, broad scientific research given. Finally, doctoral presents serious weaknesses in widely deployed cryptosystems, still actively billions consumers their daily lives.