31:
316:
Corporation, which provides email encryption services, and Bay
Dynamics. He has served as an adviser to Cyphort, Bitglass, Onset Ventures, Glenbrook Partners, PGP corporation, Arcot Systems, Finjan, Actiance, Symplified, and Zetta. He served as Chief Security Officer of
295:
group. After helping
Securify spin out from Kroll-O'Gara, Taher served as the company's chief technology officer (CTO) from 2001 to 2004. In late 2008, Securify was acquired by Secure Computing and is now part of
490:
115:
240:. Although he came to the United States to pursue a PhD in Electrical Engineering at Stanford University, he said that "cryptography was the most beautiful use of math he'd ever seen".
563:
358:
Elgamal is a recipient of the RSA Conference 2009 Lifetime
Achievement Award, and he is recognized as the "father of SSL," the Internet security standard Secure Sockets Layer.
482:
188:
since 2013. Prior to that, he was the founder and CEO of
Securify and the director of engineering at RSA Security. From 1995 to 1998, he was the chief scientist at
408:
T. Elgamal, "A public key cryptosystem and a signature scheme based on discrete logarithms", IEEE Trans. Inf. Theory, vol. 31, no. 4, pp. 469–472, Jul. 1985.
783:
676:
899:
965:
856:
646:
216:
312:
Elgamal is a co-founder of NokNok Labs and InfoSec Global. He serves as a director of
Vindicia, Inc., which provides online payment services,
1158:
414:
T. Elgamal, "The new predicaments of security practitioners", Computer Fraud & Security, vol. 2009, no. 11, pp. 12–14, Nov. 2009.
1193:
997:
983:
831:
203:
Elgamal's 1985 paper entitled "A Public Key
Cryptosystem and A Signature Scheme Based on Discrete Logarithms" proposed the design of the
280:
411:
T. ElGamal, "On
Computing Logarithms Over Finite Fields", in Advances in Cryptology – CRYPTO ’85 Proceedings, 1986, pp. 396–402.
874:
1163:
597:
313:
271:
in 1984. He served as chief scientist at
Netscape Communications from 1995 to 1998, where he was a driving force behind
1168:
1131:
1075:
701:
1183:
1178:
1173:
1138:
807:
564:"Solving Puzzles to Protect the Cloud: CTO Taher Elgamal on His Role at Salesforce and the Future of Cryptography"
381:
125:
105:
680:
304:
as a CTO. Tumbleweed was acquired in 2008 by Axway Inc. Elgamal is now a CTO for security at
Salesforce.com.
200:
while working at
Netscape, which helped in establishing a private and secure communications on the Internet.
759:
212:
677:"RSA Conference Recognizes Axway CSO Dr. Taher Elgamal for Lifetime Achievement in Information Security"
514:
Elgamal, Taher (1985). "A Public key Cryptosystem and A Signature Scheme based on discrete Logarithms".
220:
860:
384:, 2022, for contributions to cryptography, e-commerce, and protocols for secure internet transactions.
301:
528:
374:
208:
1060:. Lecture Notes in Computer Science. Vol. 218. Springer Berlin Heidelberg. pp. 396–402.
1056:
ElGamal, Taher (1986). "On Computing Logarithms over Finite Fields". In Williams, Hugh C. (ed.).
1021:
Elgamal, T. (July 1985). "A subexponential-time algorithm for computing discrete logarithms over
284:
1188:
523:
248:
1153:
370:
292:
272:
193:
93:
8:
252:
82:
541:
204:
1104:
329:
Elgamal has also held executive roles at technology and security companies, including
1108:
1071:
735:
622:
593:
197:
184:
and entrepreneur. He has served as the Chief Technology Officer (CTO) of Security at
727:
614:
483:"Father of SSL, Dr. Taher Elgamal, finds fast-moving IT projects in the Middle East"
397:
T. ElGamal, "A subexponential-time algorithm for computing discrete logarithms over
1100:
1061:
1038:
941:
923:
545:
533:
362:
244:
160:
77:
998:"National Academy of Engineering Elects 111 Members and 22 International Members"
288:
1091:
Elgamal, Taher (2009-11-01). "The new predicaments of security practitioners".
318:
256:
165:
153:
443:(one word, singly capitalized), as it is less likely to be mangled in English.
1147:
1112:
1066:
1042:
984:"Cryptographers Paul Kocher and Taher Elgamal Awarded The 2019 Marconi Prize"
739:
647:"Cryptographers Paul Kocher and Taher Elgamal Awarded the 2019 Marconi Prize"
626:
615:"Netscape's Chief Scientist Leaves Firm To Form a Computer-Security Start-Up"
537:
366:
181:
120:
464:
276:
143:
30:
237:
287:. According to an interview with Elgamal, when Securify was acquired by
185:
97:
405:)", IEEE Trans. Inf. Theory, vol. 31, no. 4, pp. 473–481, 1985.
924:"Taher A Elgamal, Evolution Equity Partners: Profile and Biography"
189:
613:
Journal, Don ClarkStaff Reporter of The Wall Street (1998-09-29).
875:"Renowned Cryptographer Taher Elgamal is Our New CTO of Security"
439:
are also found in cryptographic literature. He himself spells it
268:
101:
900:"Startup Nok Nok Labs pitches strong new authentication process"
728:"Kroll-O'Gara Acquires Securify For About $ 64 Million in Stock"
297:
966:"Salesforce Loses Another Security Leader in Executive Exodus"
784:"Dr. Taher Elgamal Joins Zix Corporation's Board of Directors"
348:
Chief Scientist of Netscape Communications from 1995 to 1998.
57:
857:"Taher Elgamal joins Tumbleweed as Chief Technology Officer"
236:
According to an article on Medium, Elgamal's first love was
377:
and other contributions to the security of communications".
345:
CEO and President of Securify, Inc. from 1998 to 2001 and,
180:(Arabic: طاهر الجمل) (born 18 August 1955) is an Egyptian
832:"McAfee, Inc. Completes Acquisition of Secure Computing"
590:
Codes: The Guide to Secrecy from Ancient to Modern Times
760:"Kroll-O'Gara announces private financing of Securify"
726:
Reporter, a Wall Street Journal Staff (1999-01-04).
333:
CTO of Security at Salesforce.com from 2013 to 2023,
339:
CTO at Tumbleweed Communications from 2006 to 2008,
1145:
1139:Serial Entrepreneur Interview with Sramana Mitra
1058:Advances in Cryptology — CRYPTO '85 Proceedings
592:. Boca Raton: Chapman & Hall. p. 185.
217:National Institute of Standards and Technology
702:"Serial Entrepreneur: Taher Elgamal (Part 9)"
275:. He also was the director of engineering at
393:As a scholar, Elgamal published 4 articles:
307:
1129:
321:, Inc. He is vice chairman of SecureMisr.
29:
1065:
527:
211:. The latter scheme became the basis for
116:RSA Conference Lifetime Achievement Award
725:
561:
342:CTO at Securify, Inc. from 2001 to 2004,
192:He has been described as the "father of
1130:Westervelt, Robert (25 February 2009).
1090:
1055:
1031:IEEE Transactions on Information Theory
1020:
897:
808:"Securify Acquired By Secure Computing"
612:
516:IEEE Transactions on Information Theory
513:
480:
1146:
587:
267:Elgamal joined the technical staff at
679:. Reuters. 2009-04-22. Archived from
336:CSO at Axway, Inc. from 2008 to 2011,
671:
669:
667:
557:
555:
509:
507:
476:
474:
1159:American people of Egyptian descent
568:Salesforce Engineering Blog: Medium
247:in 1977, and MS and PhD degrees in
13:
1194:American chief technology officers
324:
14:
1205:
1123:
664:
552:
504:
471:
291:, he became the president of its
205:ElGamal discrete log cryptosystem
562:Lindeman, Laura (May 16, 2019).
255:in 1981 and 1984, respectively.
1084:
1049:
1014:
990:
976:
958:
934:
916:
891:
867:
849:
824:
800:
776:
752:
719:
694:
493:from the original on 2020-06-22
388:
382:National Academy of Engineering
126:National Academy of Engineering
106:Discrete logarithm cryptography
639:
606:
581:
457:
425:
365:were jointly awarded the 2019
352:
259:was his dissertation advisor.
1:
1164:Egyptian electrical engineers
1105:10.1016/S1361-3723(09)70140-X
1093:Computer Fraud & Security
898:Messmer, Ellen (2013-02-12).
481:Messmer, Ellen (2012-12-04).
450:
300:. In October 2006, he joined
231:
226:
7:
764:Cincinnati Business Courier
588:Mollin, Richard A. (2005).
213:Digital Signature Algorithm
10:
1210:
369:for "their development of
243:Elgamal earned a BSc from
221:Digital Signature Standard
1169:Public-key cryptographers
302:Tumbleweed Communications
283:in 1998 and becoming its
262:
196:" for the work he did in
171:
159:
149:
139:
132:
111:
89:
73:
65:
40:
28:
21:
1067:10.1007/3-540-39799-x_28
1043:10.1109/TIT.1985.1057075
538:10.1109/TIT.1985.1057074
465:"Taher Elgamel LinkedIn"
418:
308:Entrepreneurial ventures
209:ElGamal signature scheme
190:Netscape Communications.
1184:Cairo University alumni
1179:American cryptographers
1174:Egyptian cryptographers
285:chief executive officer
35:Taher A. Elgamal (2010)
249:Electrical Engineering
16:American cryptographer
1132:"Attacks against SSL"
279:Inc. before founding
836:www.businesswire.com
651:www.businesswire.com
293:information security
273:Secure Sockets Layer
972:. January 11, 2023.
946:www.marketwatch.com
930:. October 17, 2019.
732:Wall Street Journal
619:Wall Street Journal
253:Stanford University
83:Stanford University
812:www.silicontap.com
69:American, Egyptian
928:Bloomberg Markets
599:978-1-58488-470-5
215:(DSA) adopted by
198:computer security
175:
174:
134:Scientific career
1201:
1135:
1117:
1116:
1088:
1082:
1081:
1069:
1053:
1047:
1046:
1018:
1012:
1011:
1009:
1008:
994:
988:
987:
980:
974:
973:
962:
956:
955:
953:
952:
938:
932:
931:
920:
914:
913:
911:
910:
895:
889:
888:
886:
885:
871:
865:
864:
859:. Archived from
853:
847:
846:
844:
843:
828:
822:
821:
819:
818:
804:
798:
797:
795:
794:
780:
774:
773:
771:
770:
756:
750:
749:
747:
746:
723:
717:
716:
714:
713:
698:
692:
691:
689:
688:
673:
662:
661:
659:
658:
643:
637:
636:
634:
633:
610:
604:
603:
585:
579:
578:
576:
574:
559:
550:
549:
531:
511:
502:
501:
499:
498:
478:
469:
468:
461:
444:
429:
380:Election to the
245:Cairo University
161:Doctoral advisor
78:Cairo University
54:
50:
48:
33:
23:Taher A. Elgamal
19:
18:
1209:
1208:
1204:
1203:
1202:
1200:
1199:
1198:
1144:
1143:
1126:
1121:
1120:
1089:
1085:
1078:
1054:
1050:
1019:
1015:
1006:
1004:
996:
995:
991:
982:
981:
977:
964:
963:
959:
950:
948:
940:
939:
935:
922:
921:
917:
908:
906:
896:
892:
883:
881:
879:Salesforce Blog
873:
872:
868:
855:
854:
850:
841:
839:
830:
829:
825:
816:
814:
806:
805:
801:
792:
790:
782:
781:
777:
768:
766:
758:
757:
753:
744:
742:
724:
720:
711:
709:
700:
699:
695:
686:
684:
675:
674:
665:
656:
654:
645:
644:
640:
631:
629:
611:
607:
600:
586:
582:
572:
570:
560:
553:
529:10.1.1.476.4791
512:
505:
496:
494:
479:
472:
463:
462:
458:
453:
448:
447:
430:
426:
421:
391:
355:
327:
325:Executive roles
310:
265:
234:
229:
124:
119:
104:
100:
96:
81:
74:Alma mater
61:
55:
52:
46:
44:
36:
24:
17:
12:
11:
5:
1207:
1197:
1196:
1191:
1186:
1181:
1176:
1171:
1166:
1161:
1156:
1142:
1141:
1136:
1125:
1124:External links
1122:
1119:
1118:
1083:
1076:
1048:
1037:(4): 473–481.
1013:
989:
975:
957:
933:
915:
890:
866:
863:on 2009-09-24.
848:
823:
799:
775:
751:
718:
693:
663:
638:
605:
598:
580:
551:
522:(4): 469–472.
503:
470:
455:
454:
452:
449:
446:
445:
431:The spellings
423:
422:
420:
417:
416:
415:
412:
409:
406:
390:
387:
386:
385:
378:
359:
354:
351:
350:
349:
346:
343:
340:
337:
334:
326:
323:
309:
306:
264:
261:
257:Martin Hellman
233:
230:
228:
225:
219:(NIST) as the
173:
172:
169:
168:
166:Martin Hellman
163:
157:
156:
154:Salesforce.com
151:
147:
146:
141:
137:
136:
130:
129:
113:
109:
108:
91:
90:Known for
87:
86:
75:
71:
70:
67:
63:
62:
56:
51:18 August 1955
42:
38:
37:
34:
26:
25:
22:
15:
9:
6:
4:
3:
2:
1206:
1195:
1192:
1190:
1189:Living people
1187:
1185:
1182:
1180:
1177:
1175:
1172:
1170:
1167:
1165:
1162:
1160:
1157:
1155:
1152:
1151:
1149:
1140:
1137:
1133:
1128:
1127:
1114:
1110:
1106:
1102:
1099:(11): 12–14.
1098:
1094:
1087:
1079:
1077:9783540397991
1073:
1068:
1063:
1059:
1052:
1044:
1040:
1036:
1032:
1028:
1024:
1017:
1003:
999:
993:
985:
979:
971:
967:
961:
947:
943:
937:
929:
925:
919:
905:
904:Network World
901:
894:
880:
876:
870:
862:
858:
852:
837:
833:
827:
813:
809:
803:
789:
785:
779:
765:
761:
755:
741:
737:
733:
729:
722:
707:
706:Sramana Mitra
703:
697:
683:on 2013-11-10
682:
678:
672:
670:
668:
652:
648:
642:
628:
624:
620:
616:
609:
601:
595:
591:
584:
569:
565:
558:
556:
547:
543:
539:
535:
530:
525:
521:
517:
510:
508:
492:
488:
487:Network World
484:
477:
475:
466:
460:
456:
442:
438:
434:
428:
424:
413:
410:
407:
404:
400:
396:
395:
394:
383:
379:
376:
372:
368:
367:Marconi Prize
364:
360:
357:
356:
347:
344:
341:
338:
335:
332:
331:
330:
322:
320:
315:
305:
303:
299:
294:
290:
286:
282:
278:
274:
270:
260:
258:
254:
250:
246:
241:
239:
224:
222:
218:
214:
210:
206:
201:
199:
195:
191:
187:
183:
182:cryptographer
179:
178:Taher Elgamal
170:
167:
164:
162:
158:
155:
152:
148:
145:
142:
138:
135:
131:
127:
122:
121:Marconi Prize
117:
114:
110:
107:
103:
99:
95:
92:
88:
84:
79:
76:
72:
68:
64:
59:
53:(age 69)
43:
39:
32:
27:
20:
1096:
1092:
1086:
1057:
1051:
1034:
1030:
1026:
1022:
1016:
1005:. Retrieved
1001:
992:
978:
969:
960:
949:. Retrieved
945:
936:
927:
918:
907:. Retrieved
903:
893:
882:. Retrieved
878:
869:
861:the original
851:
840:. Retrieved
838:. 2008-11-18
835:
826:
815:. Retrieved
811:
802:
791:. Retrieved
788:Zixcorp Blog
787:
778:
767:. Retrieved
763:
754:
743:. Retrieved
731:
721:
710:. Retrieved
708:. 2007-04-01
705:
696:
685:. Retrieved
681:the original
655:. Retrieved
653:. 2019-03-13
650:
641:
630:. Retrieved
618:
608:
589:
583:
571:. Retrieved
567:
519:
515:
495:. Retrieved
486:
459:
440:
436:
432:
427:
402:
398:
392:
389:Publications
361:Elgamal and
328:
311:
289:Kroll-O'Gara
277:RSA Security
266:
242:
235:
202:
177:
176:
150:Institutions
144:Cryptography
133:
1154:1955 births
1002:NAE Website
573:October 17,
363:Paul Kocher
353:Recognition
238:mathematics
207:and of the
66:Nationality
1148:Categories
1007:2022-03-25
951:2019-10-17
942:"Zix Corp"
909:2019-10-17
884:2019-10-17
842:2019-10-17
817:2019-10-17
793:2021-04-27
769:2021-04-27
745:2019-10-17
712:2019-10-17
687:2013-03-20
657:2019-10-17
632:2019-10-17
497:2020-06-22
451:References
232:Early life
186:Salesforce
98:Public-key
47:1955-08-18
1113:1361-3723
970:Bloomberg
740:0099-9660
627:0099-9660
524:CiteSeerX
227:Biography
85:(MS, PhD)
491:Archived
433:El Gamal
281:Securify
546:2973271
441:Elgamal
437:ElGamal
269:HP Labs
223:(DSS).
102:ElGamal
60:, Egypt
1111:
1074:
738:
625:
596:
544:
526:
298:McAfee
263:Career
140:Fields
128:(2022)
123:(2019)
118:(2009)
112:Awards
1029:²)".
542:S2CID
419:Notes
319:Axway
251:from
80:(BSc)
58:Cairo
1109:ISSN
1097:2009
1072:ISBN
736:ISSN
623:ISSN
594:ISBN
575:2019
435:and
41:Born
1101:doi
1062:doi
1039:doi
534:doi
375:TLS
371:SSL
314:Zix
194:SSL
94:SSL
1150::
1107:.
1095:.
1070:.
1035:31
1033:.
1023:GF
1000:.
968:.
944:.
926:.
902:.
877:.
834:.
810:.
786:.
762:.
734:.
730:.
704:.
666:^
649:.
621:.
617:.
566:.
554:^
540:.
532:.
520:31
518:.
506:^
489:.
485:.
473:^
399:GF
49:)
1134:.
1115:.
1103::
1080:.
1064::
1045:.
1041::
1027:p
1025:(
1010:.
986:.
954:.
912:.
887:.
845:.
820:.
796:.
772:.
748:.
715:.
690:.
660:.
635:.
602:.
577:.
548:.
536::
500:.
467:.
403:p
401:(
373:/
45:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
