SLR 09 – Compression encryption and hashing 46. OCR A Level (H446) SLR9 – 1.3 Lossy vs lossless 47. OCR A Level (H446) SLR9 – 1.3 Run length & dictionary coding 48. OCR A Level (H446) SLR9 – 1.3 Symmetric & asymmetric encryption 49. OCR A Level (H446) SLR9 – 1.3 Hashing
