San Francisco police encrypted radio and ended a century of full public access
SFPD encrypted most of its radio traffic on December 12, 2021. A city that passed one of the nation's strongest open-government laws in 1993 cut the public down to half a conversation — with no public vote.
Key Facts
What San Francisco chose to give up
San Francisco has the Sunshine Ordinance, a 1993 law giving the public broad rights to observe government proceedings. It's home to the Electronic Frontier Foundation and a tech sector that has spent decades preaching open access to information.
On December 12, 2021, SFPD became what BuzzFeed News described as the largest department in the state to encrypt nearly all of its radio traffic. For the first time since the department got radios in the early 20th century, the public lost the ability to hear officers in the field.
BuzzFeed News reported that the encryption barred hobbyists, journalists, and audio platforms that broadcast police streams from monitoring even standard police operations.— BuzzFeed News, December 2021
The same city that banned police use of facial recognition in 2019 decided its officers' radio traffic should be inaccessible to the neighbors and journalists trying to follow their work.
The hybrid in practice: half a conversation
In May 2021, SFPD announced a "hybrid system" — described at the time as the first of its kind in California — that would preserve some public access.
What SFPD Promised (May 2021)
- Dispatchers would send officers to incidents on open channels
- At the conclusion of incidents, dispatchers would state outcomes publicly (arrests made, report taken, etc.)
- Communications regarding the incident and PII checks would use encrypted channels
What Listeners Actually Get (as of June 2026)
- Dispatcher transmissions stay in the clear on each district's primary talkgroup — but officers' replies on those same channels are encrypted, per the RadioReference database
- The secondary talkgroups used by officers' handheld radios are encrypted full-time
- The public hears the call go out and how it ends; everything in between — the actual police work — is encrypted
The hybrid is real, but it delivers half a conversation. A P25 Phase II-capable scanner picks up the dispatcher's side and nothing else. When BuzzFeed News covered the December 2021 switch, hobbyists were reporting that practically all transmissions had gone dark; the dispatcher-side access that exists today is the surviving public slice.
Timeline: From Open to Dark
California DOJ issues directive requiring protection of PII transmitted over police radios
SFPD announces hybrid encryption plan—first locality to select this approach
Original target date for new system (delayed)
Scanner hobbyists track department's shift from analog to digital system
Encryption goes live—hobbyists find nearly all traffic dark; SFPD confirms the new protocol the next day
State Senator Josh Becker introduces SB 1000 to restore public access statewide
SB 1000 fails to advance to the full state Assembly
The DOJ directive: same rule, different choices
SFPD cited a California Department of Justice mandate to protect personally identifiable information (PII) as its justification for encrypting. The DOJ directive did not require blanket encryption.
How Agencies Responded to the Same DOJ Directive
Full Encryption
San Jose, Oakland, most of Santa Clara County
Encrypted everything—dispatch, tactical, routine communications. Public hears nothing.
Hybrid/Partial
SFPD (dispatcher side open), Sacramento PD & Sheriff
Encrypted some channels or one side of the conversation, kept the rest open. Mixed public access.
Alternative Methods
California Highway Patrol
Kept dispatch and patrol channels open. Officers use cell phones or encrypted tactical channels for sensitive information.
The California Highway Patrol, the state's largest law enforcement agency, chose open dispatch and routes sensitive information through cell phones or secure channels. CHP is proof that full encryption is a policy decision, not an obligation.
"This is a negative—we want access for journalists, we want access for the public. I think it's a loss for the public, it's a loss for journalism."— State Senator Josh Becker, author of SB 1000
Media credentialing: better than nothing, not good enough
Unlike cities that locked everyone out, San Francisco kept dispatcher audio public and created a credentialing route through which vetted journalists can seek access to encrypted SFPD traffic.
That preserves some accountability. But a credentialing model has structural problems regardless of how it's administered.
Who Qualifies as Media?
SFPD decides who gets access. Independent journalists, bloggers, and critics could be excluded. Even if powers aren't abused, the potential creates a chilling effect.
Community Watchdogs Excluded
Copwatch organizations, neighborhood safety monitors, and citizen oversight groups have no access to real-time police communications.
Emergency Info Lost
Residents can't monitor police activity during active emergencies. The public safety benefit of scanner access during shootings, disasters, or civil unrest is eliminated.
Self-Censorship Risk
Journalists may soften coverage to maintain credential access. When police control who monitors them, coverage independence is compromised.
Read our detailed analysis of San Francisco's media access program for a deeper examination of this compromise model.
FriscoLive415 and the street-level workaround
Encryption changed San Francisco's scanner community rather than ending it. FriscoLive415, a 35-year-old cyclist, monitors multiple Bay Area public safety scanners simultaneously from his apartment and posts videos of street activity and police response in the Tenderloin and Mid-Market.
He has more than 13,000 followers on X and has broken news nationally, including footage of a Cruise robotaxi incident in the period before the DMV suspended Cruise's driverless permits in San Francisco.
Community Monitoring Continues
While most SFPD radio is encrypted, scanner watchers have adapted:
- SFPD dispatcher transmissions remain in the clear on district primary channels (P25 Phase II scanner required)
- SFFD remains unencrypted—fire and medical calls are still audible
- SomaFM, ScanSF, and Broadcastify stream available channels
- Citizen app, Nextdoor, and Twitter fill information gaps
But these alternatives are incomplete. During protests, use-of-force incidents, and active crime scenes, the public now depends entirely on official statements rather than anything they can verify themselves.
The surveillance record
San Francisco's record on surveillance and oversight does not run in one direction:
Banned facial recognition for city use in 2019—the first major US city to do so
Passed Proposition E in 2024, allowing SFPD to experiment with surveillance technology without oversight
Created civilian oversight through the Police Commission and Office of Citizen Complaints
Approved live access to private security cameras for police, over community objections
The EFF and ACLU have documented SFPD's history of surveillance overreach, including intelligence files on more than 100,000 San Franciscans in the 1970s. Radio encryption extends that pattern: more control over information flowing out of the department, less ability for the public to observe what police actually do.
San Francisco vs. Oakland
Oakland encrypted in October 2025, nearly four years after San Francisco. The two cities made the same decision differently.
| Factor | San Francisco | Oakland |
|---|---|---|
| Encryption Date | December 2021 | October 15, 2025 |
| Public Access Remaining | Dispatcher side in the clear; media credentialing | No alternative offered |
| Oversight Notification | Public discussion occurred | Police Commission not consulted |
| Federal Oversight | No consent decree | Under consent decree since 2003 |
| Rollout | Overnight switch; hobbyists noticed first | Delayed from Sept. 3 due to "unexpected technical issues" |
San Francisco's approach is imperfect but at least preserved the dispatcher channel. Oakland's was a surprise total blackout. Neither city chose the CHP model, which keeps both sides of routine traffic open while protecting sensitive information.
What you can still monitor in San Francisco
Not all public safety traffic is encrypted. As of June 2026, residents still have some options (verify current status on RadioReference's SF P25 system page):
SFPD Dispatcher Channels
Dispatcher transmissions on district primary talkgroups remain in the clear. You hear calls dispatched and dispositions — not officers. Requires a P25 Phase II-capable scanner.
San Francisco Fire Department
SFFD dispatch and tactical channels remain unencrypted. Available on Broadcastify, SomaFM Scanner, and physical scanners.
- SFFD-A1 through A3: Dispatch Divisions 1-3
- SFFD-A4 through A6: Command Divisions 1-3
- SFFD-C7: BART underground incidents
Online Streams
Multiple services stream available San Francisco public safety frequencies:
- SomaFM Scanner: somafm.com/scanner
- ScanSF: scansf.com
- Broadcastify: SF City Fire and EMS feed
Alternative Information
While not scanner access, other sources provide incident information:
- Citizen app notifications
- SFPD Twitter/X account
- Local news broadcasts
- Nextdoor neighborhood alerts
What San Francisco demonstrates
A city's reputation doesn't protect it
San Francisco's open-government reputation did not prevent encryption. Stated values require enforceable policy to mean anything.
A hybrid is half a conversation
SFPD's hybrid kept the dispatcher audible — and encrypted everything officers say. Partial access is real, but it's not oversight of police conduct.
Any preserved access beats a total blackout
San Francisco's open dispatcher channel and media route preserve some independent visibility. Cities with no access have nothing comparable.
CHP proves full encryption is optional
The state's largest agency keeps dispatch open. Agencies that encrypt everything are making a choice, not complying with a mandate.
San Francisco's encryption was a choice
Other California communities have pushed back. Palo Alto reversed course entirely.
Sources
- BuzzFeed News: "The San Francisco Police Department Has Encrypted Its Radio Feeds" (December 2021)
- Palo Alto Daily Post: "San Francisco finds an alternative to full encryption of police radios" (May 2021)
- Mission Local: "How San Francisco scanner chaser FriscoLive415 got his followers" (October 2023)
- Electronic Frontier Foundation: "Police Surveillance in San Francisco" reports (2022-2024)
- RCFP: "Trend toward local police radio encryption grows, as does resistance"
- RadioReference.com: San Francisco County/City P25 trunking system (sid 6758) — talkgroup encryption modes
- The Berkeley Scanner: Bay Area encryption coverage describing SF's open dispatcher audio (October 2025)