Williams, D. Cofiant y Parch R. Ellis (Cynddelw), gyda rhagair gan Dr Cernyw Williams.

Caerfyrddin, 1935. Clawr caled, 872 tud. (clamp o gyfrol!). Cyflwr y llyfr yn dda.

£15.00, cludiant yn ychwanegol. Rhif cat. 676.

Just as a note, you often see key strengths described in web service here bit length with rsa being 1024 or 2048 bits, and aes being 128 or 256 bits

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