STU-I

The STU-I, like its successors sometimes known as a "stew phone", was a secure telephone developed by the U.S. National Security Agency for use by senior U.S. government officials in the 1970s.

External links

Delusion.org - National Cryptologic Museum pictures

See also

Cipher machines

Rotor machines:	CCM Enigma M – 125 Fialka Hebern HX-63 KL-7 Lacida M-325 Mercury NEMA OMI Portex RED SIGABA SIGCUM Singlet Typex

Mechanical:	Bazeries cylinder C-36 C-52 CD-57 Cipher disk HC-9 Kryha Jefferson disk M-94 M-209 Reihenschieber Scytale

Teleprinter:	5-UCO BID 770 DUDEK KW-26 KW-37 Lorenz SZ 40/42 Siemens and Halske T52

Secure voice:	BID 150 FASCINATOR KY-3 KY-57 KY-58 KY-68 OMNI SCIP Sectéra Secure Module SIGSALY STE STU-II STU-III VINSON

Miscellaneous:	JADE KG-84 KL-43 Noreen PURPLE Pinwheel Rockex

Cryptography

History of cryptography · Cryptanalysis · Cryptography portal · Outline of cryptography

Symmetric-key algorithm · Block cipher · Stream cipher · Public-key cryptography · Cryptographic hash function · Message authentication code · Random numbers · Steganography

National Security Agency

Locations	Ft. Meade • MRSOC • KRSOC • Georgia Cryptologic Center • Bad Aibling Station • Rosman Research Station • MSOC • AMOC

Leaders	Ralph Canine • John A. Samford • Laurence Hugh Frost • Gordon Blake • Marshall Carter • Noel Gayler • Samuel C. Phillips • Lew Allen • Bobby Ray Inman • Lincoln D. Faurer • William Eldridge Odom • Bill Studeman • John Michael McConnell • Kenneth Minihan • Michael Hayden• Keith B. Alexander

Prominent figures	Bernard Ardisana • Howard C. Barlow • William Blankinship • Dorothy T. Blum • Benson K. Buffman • Lambros D. Callimahos • Ralph J. Canine • James R. Chiles • Mahlon E. Doyle • Agnes Meyer Driscoll • Thomas H. Dyer • Edward A. Everett • Lowell K. Frazer • Elizebeth S. Friedman • William F. Friedman • Charles L. Gandy • Meredith Gardner • Alfred M. Gray • Jacob Gurin • Robert J. Hermann • Sydney Jaffe • David Kahn • Oliver R. Kirby • Richard A. Leibler • Solomon Kullback • Mitford M. Mathews • Juanita Moody • John E. Morrison • Cecil J. Phillips • James W. Pryde • Francis Raven • Joseph J. Rochefort • Howard E. Rosenblum • Frank Rowlett • Laurance Safford • Arthur Salemme • Donald M. Showers • Abraham Sinkov • Samuel S. Snyder • Charles C. Tevis • John Tiltman • Louis W. Tordella • Thomas E. Tremain • Julia Ward • Joseph N. Wenger • Norman Wild • Herbert O. Yardley • Milton Zaslow

Operations	COMINT • Information Assurance • SIGINT

Technology	FROSTBURG • HARVEST • Secure Terminal Equipment (STE) • Secure Telephone Unit (STU)-1 • STU-II • STU-III

Controversy	James Bamford • Church Committee • Thomas Andrews Drake • ECHELON • NSA warrantless surveillance controversy • Pike Committee • Thomas Tamm • Russ Tice • TRAILBLAZER

Other	Dundee Society • National Cryptologic Museum • National Cryptologic School • National Vigilance Park • NSA Hall of Honor • VENONA • Zendian Problem