Cryptanalysis turned to single alphabet N-bit substitutions:
Cryptanalysis turned to single alphabet N-bit substitutions:
...nor is the collating order of the characters...cartridges with a lot more than 256 characters... and you've got a real puzzle
There are old algorithms for post WW1 cryptanalysis that will help with that. The "Index to Coincidence" (IC) applied to Hebrew character statistics will let you break it down if you have N-bit substitutions for single alphabet Hebrew characters in normal prose.
You can use I.C. to determine the likely language of some forms of ciphertext without even knowing the decryption yet. Its also useful for identifying how many alphabetic substitutions are used in a polyalphabetic encryptions... for example, if you know its English you can run the IC algorithm for assumed numbers of alphabets and when you have the right number, the IC will be as expected.
That's more complicated than what you have. You have a single alphabetic substitution cipher... in your case a n-bit typeset code to a Hebrew character. You should be able to whittle that done much easier.
What it would do for you if you can get that data for Hebrew (it would exist but availability... who knows) it would organize the N-bit representations into sets of likely character substitutions. With that you can use common digrams to trigrams to get the neighboring letters to the letters you already have and before you know it you have more characters than missing characters. At some point you might need a linguist to fill in sentence gaps with likely words/letters. All you need is the set of solutions for the number a characters used in your puzzle.
Here some books:
Elementary Cryptanalysis - A Mathematical Approach, by Abraham Sinkov (has the IC algorithm on my cover)
Cryptanalysis - A study of ciphers and their solution, by Helen Fouche Gaines
A lesser book representing some algorithms in BASIC:
Codes Ciphers and Computers - an introduction to information security, by Bruce Bosworth.
If you want the big picture on the history of Cryptanalysis the classic is:
The Codebreakers - The story of secret writing, by David Kahn (history through pre-WW2)
I'll post the ISBN numbers for each book if you request.