Number | Name | Date | Kind |
---|---|---|---|
3657699 | Rocher et al. | Apr 1972 | |
3740475 | Ehrat | Jun 1973 | |
3798605 | Feistel | Mar 1974 | |
3962539 | Ehrsam et al. | Jun 1976 | |
3984668 | Zetterberg et al. | Oct 1976 |
Entry |
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C. M. Campbell, Jr.; Conf. on Computer Security and the Data Encryption Standard; NBS (Preprint of Papers); Feb. 15, 1977. |
B. Morgan; Conf. on Computer Security and the Data Encryption Standard; NBS (Preprint of Papers); Feb. 15, 1977. |