A cryptographic system (CS) is provided. The CS (500) is comprised of a data stream receiving means (DSRM), a ring generator (RG) and an encryptor. The DSRM (602) provides a data stream (DS). The RG (400) includes a computing (404-408), converting (404-408) and permutation (410) means. The computing...http://www.google.com.au/patents/US7995749?utm_source=gb-gplus-sharePatent US7995749 - Cryptographic system configured for extending a repetition period of a random sequence
