TELEPHONE SECURITY

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-04360A000100020078-2
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: November 17, 2016
• Document Release Date: July 5, 2000
• Sequence Number: 78
• Publication Date: March 15, 1956
• Content Type: REGULATION

Approved For Release 2000/08/04: CIA-RDP78-0436OA000100020078-2
INSTRUCTION NO
LI 10-350-3
REFERENCE: Agency Regulation
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LI 10-350-.3
SECURITY
15 March 1956
RFCISSION: Procurement & Supply Office Regulation No. OPS/10-6,
dated 13 March 1952
1. GENERAL
The purpose of this Instruction is to implement the referenced Regu-
lation and to set forth information regarding the responsibilities of
Staff and Division Chiefs, as well as security practices to be followed
by all employees within the Office of Logistics.
2. RESPONSIBILITIES
Staff and Division Chiefs are responsible for determining that Agency
and Logistics Regulations, Notices, and Instructions pertaining to the
safeguarding of classified information are strictly adhered to when
using telephones.
3, EMPLOYEE SECURITY PRACTICES
a. Attention is particularly directed to that portion of Agency Security
Regulation paragraph 3(b)(1), which.reads:
"The presumption must be that every conversation by telephone
or interoffice communication systems will be overheard by un-
authorized persons. Telephone and interoffice communication
wires are not protected; therefore, classified matter must never
be discussed over such facilities. T;?hen using unlisted outside
telephones, employees should bear in mind that such facilities
are not more secure than lines through the Agency switchboard,
When answering the telephone, an employee shall normally give
the telephone extension only. In certain areas special tele-
phone instructions may be issued by the supervisor. When a
person requests information over the telephone and there is any
doubt regarding his identity or the necessity for his requiring
the information, the employee will take the caller's name and
telephone number and offer to return the call. Employees will
not transmit information about CIA to unknown or unauthorized
persons."
Approved For Release 2000/08/04: CIA-RDP78-0436OA000100020078-2
 Approved For Release 2000/08/04: CIA-RDP78-04360A000100020078-2
LI 10-350-3
INSTRUCTION NO. SECURITY
LI 10-350-3 15 March 1956
b. It should be noted that the prohibition quoted in paragraph (a) above
applies to classified information. This means that there are details
about a classified subject which in themselves are not "classified
information" and may be discussed on the telephone. This, however,
puts the responsibility for decision as to what is "classified infor-
mation" on the person presenting it and thus great care must be
exercised. It is also important that a person called on the telephone
who receives what he considers to be "classified information", call
this to the other person's attention for reconsideration as to whether
security is being violated. If there is a continuing doubt in the
mind of the recipient of such information, he should terminate the
call promptly and offer to continue the subject matter by personal
conversation or by mail, as the distance between the two persons may
dictate.
Chief, Administrative Staff
Distribution:
All Employees
OL/SS:-:mel
Approved For Release 2000/08/04: CIA-RDP78-04360A000100020078-2