Estimation of the number of reliability values needed for correction of long soft input decryption, blocks

This paper presents an estimation of the number of reliability or so called L-values which are needed for correction of long soft input decryption blocks. Soft input decryption is a novel method which uses L-values (soft output) of a SISO channel decoder for the correction of input of soft input decryption (SID blocks) which have been modified during the transmission over a noisy channel. The method is based on the combination of cryptography and channel coding improving characteristics of both of them. The number of L-values is estimated for different lengths of SID blocks as well as for different E_b/N₀ ratios.