Editing Openai/692c8201-7a4c-800d-9ca0-5220fef3e400 (section)

=== (Shown here as a fragment of a key page and a worked worksheet using the key; groups are shown in the historical 5-digit group format used in the documents) ===

Key page fragment (pad page, rows of 5-digit additive groups; each row is one line on the pad)

<syntaxhighlight>Pad serial: [page id / sheet number]   --  (format used in VENONA materials)

  84627  39105  72084  01359  26740  59318  40267  11893
  59021  03475  18260  99903  47182  65014  02219  83456
  40186  77012  23590  10847  66203  91740  35029  48011
  12784  90936  00425  68157  49230  71308  26091  55834
  63210  11589  47806  99024  35371  20845  86412  04799
  27503  48961  13084  70625  94170  38246  55008  61732
  98840  04721  31458  67209  10536  85329  24011  46657
  30416  76285  09103  54897  22064  68931  01752  99640

</syntaxhighlight>

Worked worksheet example (superenciphering a numeric code group stream by adding pad additives)

Plaintext code groups (example code groups from underlying codebook)

<syntaxhighlight>  314  875  602  109  446  028  751  993   (example 3-digit code groups used in historical workflow)

</syntaxhighlight>

Select a column from the pad above (take matching additive groups aligned to the message length). For each code group, add corresponding pad digits (mod 10 addition done digit by digit across the group). Example (shown here as 3-digit groups, addition performed digitwise mod 10):

<syntaxhighlight>Plaintext  314   875   602   109   446   028   751   993
Additive   846   391   720   013   267   593   402   118    (from pad fragment above, corresponding three leftmost digits of each 5-digit group)
Ciphertext (digitwise add mod10)
           160   266   322   122   713   621   153   111

</syntaxhighlight>

(Deciphering is the reverse operation: subtract the additive digits digitwise mod 10)