WASHINGTON — A member of a civil liberties watchdog board that investigates the nation’s safety packages criticized on Tuesday a serious — however nonetheless secret — report by his group a couple of Nationwide Safety Company surveillance-related system, portraying the trouble as shoddy and a missed alternative.

The official, Travis LeBlanc, is a Democratic appointee to the five-member company, the Privateness and Civil Liberties Oversight Board. His critique — in a newly declassified, 10-page statement — opened a window into infighting on the board and provided a number of hints concerning the categorised examine, which it accomplished in December after greater than six years of labor.

However different present and former officers pushed again on Mr. LeBlanc’s complaints and defended the oversight effort. As a result of the underlying report stays categorised, it’s troublesome to evaluate the rival factors of view.

The existence of the system, known as XKeyscore, came to public light in 2013 as a part of the leaks by the previous intelligence contractor Edward Snowden. The system allows Nationwide Safety Company analysts to question big repositories of intercepted web communications and metadata in the hunt for data.

A lot of the intercepts that XKeyscore makes accessible to analysts have been vacuumed up by the company underneath Executive Order 12333, which governs surveillance that takes place overseas and the interception of foreign-to-foreign communications as they cross home soil.

Congress has left that sort of national-security surveillance largely unregulated, and 12333 rules permit bulk, indiscriminate collection with out a warrant. That has lengthy raised privacy and civil liberties concerns about what the federal government might do with People’ non-public messages which might be by the way swept in. (Due to how the web works, home messages are typically routed overseas.)

The oversight board determined in 2014 to undertake a categorised examine of Govt Order 12333 actions that would come with examination of three matters ruled by that edict. Two concerned the C.I.A., and their matters stay categorised. The third entails the Nationwide Safety Company’s XKeyscore system.

The examine, about 56 pages, was supplied to Congress and government department oversight officers in categorised briefings in March, present and former officers stated.

A number of points sophisticated duty for the report. The primary is that the board advanced considerably through the effort.

The examine’s scope was chosen when the board was underneath Democratic management. Then some members departed and the board lacked a quorum, however its workers pursued the trouble. The report was accomplished when the board was underneath Republican management.

One other complicating issue is that the board authorised the report in December by voice vote with out recorded opposition, based on a number of officers. Mr. LeBlanc informed its normal counsel the subsequent day to report him as a no, they stated. Mr. LeBlanc stated he had abstained through the voice vote, including that he was “shocked” that the board was out of the blue voting on it.

“I’m unable to help” the XKeyscore system, he wrote. “I harbor severe reservations concerning the deficiencies in our oversight of the XKeyscore program in addition to vital issues about this system’s operations.”

Mr. LeBlanc provided myriad criticisms of the report, portraying the board’s approval of it as rushed and pointing to gaps like a failure to scrutinize the usage of synthetic intelligence in reference to the system, to conduct an ample evaluation of oversight mechanisms, and to scrutinize the Nationwide Safety Company’s assortment actions underneath Govt Order 12333, together with these that may by the way pull in People’ non-public messages.

The report, he wrote, “sadly reads extra like a guide report of the XKeyscore program than an impartial oversight evaluation grappling with key issues on this evolving technological and authorized panorama.”

However Adam Klein, a Republican who was the board’s chairman till he stepped down on June 20, defended the trouble as invaluable.

“It is a detailed, complete report and proposals on a really advanced program,” he stated. “It displays six years of labor by board workers and a number of iterations of board members. It’s extremely factual, substantive and apolitical — the kind of oversight the board was created to carry out.”

Mr. Klein and different present and former officers additionally pushed again on a few of Mr. LeBlanc’s complaints.

“The board did acquire data and ask exhausting questions concerning the location and method of assortment,” Mr. Klein stated. “The board additionally requested exhausting questions on many different points associated to XKeyscore, together with compliance and oversight mechanisms relevant to this system.”

In an interview, nevertheless, Mr. LeBlanc stated that “minimal” details about assortment actions made it into the report and that there was no effort to research it. His unclassified assertion, which was reported earlier by The Washington Post, portrays a few of the assortment actions as problematic however gives no particulars.

Mr. LeBlanc additionally criticized the board for not doing extra to take a look at episodes through which Nationwide Safety Company analysts in 2019 had violated looking out guidelines, together with in a kind of compliance incident deemed “questionable intelligence actions,” that means that it had violated the regulation, government order or different coverage guidelines.

“Clearly, violations of U.S. regulation and the identified assortment or processing of U.S. individual data are severe compliance points. But, the previous board didn’t request particular data,” he wrote, in a line that was preceded and adopted by redacted materials.

However a U.S. official, talking on the situation of anonymity, characterised the 2019 compliance episodes as comparatively minor — like a typo in a reputation being searched, leading to pulling up details about the fallacious individual — and stated none indicated a systemic drawback.

Mr. LeBlanc additionally complained that the Nationwide Safety Company lacked XKeyscore-specific coaching for privateness and civil liberties guidelines defending People. The U.S. official stated the company already skilled evaluation in such guidelines earlier than giving them entry to any system, nevertheless it was finishing up a lesson on XKeyscore in response to a suggestion within the report.

Lastly, in his assertion, Mr. LeBlanc stated that the board had requested the company for its authorized evaluation of privateness and civil liberties raised by means of XKeyscore in 2015. The subsequent yr it was given a 13-page memo dated 2016, which “made it seem as if N.S.A. had not ready a written evaluation of the legality of XKeyscore till prompted” by the oversight board.

A N.S.A. spokesperson stated its normal counsel “frequently critiques N.S.A. intelligence packages and capabilities to make sure compliance” with the regulation and had “performed applicable authorized critiques of the usage of XKeyscore.”

A footnote in Mr. LeBlanc’s assertion says that the N.S.A. informed the oversight board this yr that it had additionally produced “prior authorized analyses of XKeyscore” earlier than the 2016 memo. However whereas the board has pressed for entry to these “purported” memos, he wrote, the company has not supplied any.