Encryption Types Used by Public Safety Agencies
2,323 agencies use various encryption standards to block public access to their radio communications. Browse by technology to understand which systems are in use and their implications for transparency.
Encryption Strength Guide
Unbreakable with current technology. Complete communications blackout.
Very secure. No practical way to decode without keys.
Secure for practical purposes. Blocks consumer scanners.
Can potentially be decoded with specialized equipment.
Outdated standards still in use on older systems.
Browse by Encryption Standard
Understanding Radio Encryption
What is P25?
Project 25 (P25) is the dominant digital radio standard for public safety in the US. It supports optional encryption with a choice of ciphers. RadioReference's database, the listing we check most, usually marks a talkgroup encrypted ("Enc") without naming the algorithm, so this database shows an algorithm only where a source we fetched names it.
Why Does This Matter?
When agencies encrypt, journalists can't report on breaking news, neighbors can't know about dangers in their area, and oversight of police becomes nearly impossible. Understanding the technology helps advocates make informed arguments.
Are All Encryptions Equal?
No. The P25 standard algorithm is AES-256; the older DES standard "has been 'broken' and is no longer considered strong enough for secure communications," according to DHS Science and Technology. However, even "weak" encryption blocks typical scanner users and represents a move away from transparency.
Take Action for Transparency
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Use our templates to email your local officials about police radio encryption policies.
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