[Cryptography] NSA releases 52, 000 pages of William F. Friedman Collection

[John Young]

NSA releases 52,000 pages of William F. Friedman Collection, searchable:

<https://www.nsa.gov/public_info/declass/friedman_documents/index.shtml>https://www.nsa.gov/public_info/declass/friedman_documents/index.shtml

Document index spreadsheet:

<https://www.nsa.gov/public_info/_files/friedmanDocuments/Friedman_Collection_Metadata.xlsx>https://www.nsa.gov/public_info/_files/friedmanDocuments/Friedman_Collection_Metadata.xlsx  
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