Your own secure crypto: Assume everything popular is attacked, assume vast libraries of primitive and proprietary cryptanalysis routines. Of their thousands

Your own secure crypto: Assume everything popular is attacked, assume vast libraries of primitive and proprietary cryptanalysis routines. Of their thousands of hires with security clearance, the cipher newbies are likely given exercises attacking odds-and-ends with massive (old?) Cray orchards. OTP - is always secure but inadequate for large plaintext. Pad transport is vulnerable. Naive stream ciphers are seductive but weak. Brits, MI5(?) had RSA a decade and a half(?) before RSA. Factorization is RH(`assume Riemann Hypothesis'), perhaps new unpublished vulnerabilities to probable primes? Better amateur practicing crypto analysts than me can likely offer good points here. Wikipedia has terrific crypto intro. eg: http://en.wikipedia.org/wiki/Outline_of_cryptography http://en.wikipedia.org/wiki/Outline_of_cryptography and ... http://en.wikipedia.org/wiki/Deniable_encryption http://en.wikipedia.org/wiki/Deniable_encryption