The present invention provides a method, system, and device for producing cryptographic keys. More specifically, the cryptographic keys may be produced such that they have an effective key size and an apparent key size that differs from the effective key size. Generally, the effective key size is not...http://www.google.fr/patents/US20080037775?utm_source=gb-gplus-shareBrevet US20080037775 - Verifiable generation of weak symmetric keys for strong algorithms
Verifiable generation of weak symmetric keys for strong algorithms