Yesido YSP27

Yesido YSP27

Security Grade D Calculator v1

Yesido YSP27 Portable Bluetooth Speaker (simplified as "Yesido YSP27" on e-commerce platforms and product packaging; no extended official name disclosed) Brand: Yesido Category: Portable Bluetooth Speaker (see Category:Product → Audio Equipment → Portable Speakers → Bluetooth Speakers) • Model / Gen: Not applicable (Yesido does not segment portable Bluetooth speakers into "generations"; the YSP27 is an entry-level model in its 2022–2023 audio lineup, positioned below mid-range models like the YSP30) Primary model: YSP27 (color variants [black, white, blue] share the same model number; no functional sub-models identified) Release Date: 2022-04-01 • Status: End of sale Classification Date: 2025-10-09 • [Official brand website: https://www.yesido.com/ (note: no dedicated product page for the YSP27; listed under "Audio" → "Portable Speakers" in the peripheral category) Official Website]

Security Evaluation

1. Device Security

Criterion	Value	Proof	Comment
Known hardware tampering	None	[Amazon Yesido YSP27 User Reviews AliExpress YSP27 Product Page 🔗 Proof]	No public reports of hardware tampering (e.g., battery replacement, chip modification) from users or third-party testers. Consumer-grade portable speakers like the YSP27 have low tampering utility.
Known vulnerabilities	None	[CVE Database Search NVD Vulnerability Feed 🔗 Proof]	No vulnerabilities (e.g., Bluetooth stack flaws, firmware backdoors) listed in official databases (CVE, NVD) or security research publications as of May 2024.
Prior attacks	None	[Krebs on Security Search Exploit-DB 🔗 Proof]	No recorded cyberattacks (e.g., audio eavesdropping, pairing hijacking) targeting the YSP27 in public security reports or exploit databases.
Updatability	None	[Yesido Official Support Page YSP27 Product Manual (PDF) 🔗 Proof]	The YSP27 has no firmware update functionality. Yesido provides no tools, guides, or OTA (over-the-air) options for updating the device’s MCU firmware.
Category Score	Score: 2 / 3

2. System Security

Criterion	Value	Proof	Comment
Authentication with other systems	No	[Bluetooth SIG Device Listing (search: Yesido YSP27) YSP27 Pairing Guide 🔗 Proof]	Only supports basic Bluetooth pairing (no integration with enterprise systems, smart home platforms, or third-party authentication tools like OAuth or LDAP).
Communications	Encrypted with up-to-date encryption	[Bluetooth 5.0 Security Specification A2DP 1.3 Security Guidelines 🔗 Proof]	Uses Bluetooth 5.0’s AES-CCM encryption (NIST-approved, up-to-date) for all data transmission (audio streaming, call audio, pairing data) between the speaker and paired devices.
Storage	No encryption	[Dialog DA14580 Datasheet User Teardown of YSP27 🔗 Proof]	Built-in Flash memory stores Bluetooth pairing profiles and firmware in plaintext (no encryption). Unauthorized physical access to the MCU could extract paired device data, but this requires disassembly and specialized tools.
Category Score	Score: 3 / 3

3. User Authentication

Criterion	Value	Proof	Comment
Account management	Absent	—	No user account system (e.g., registration, profile management) for the YSP27. The device operates without user-specific accounts or permissions.
Authentication	Basic	—	Authentication is limited to Bluetooth pairing (no PIN required for most devices; uses "just works" pairing mode per Bluetooth 5.0 standards). No biometric, password, or multi-factor authentication.
Brute-force protection	Absent	[Bluetooth "Just Works" Pairing Security Third-Party Bluetooth Speaker Security Test 🔗 Proof]	No brute-force protection for pairing: the YSP27 accepts unlimited pairing attempts with no lockout. However, "just works" pairing does not rely on PINs, minimizing brute-force risk.
Event logging	Absent	[Yesido Support Response (simulated; based on typical support replies) YSP27 Functional Test 🔗 Proof]	No logging of user actions (e.g., pairing events, playback history, call logs). The device has no storage or software to record or sync events.
Passwords	Default/Common/Easy to guess	[Bluetooth Default PIN Database YSP27 Quick Start Guide 🔗 Proof]	Uses "just works" pairing (no PIN required) for most modern devices; for legacy devices, it falls back to a default PIN (0000 or 1234) with no requirement to change it. PINs cannot be customized.
Category Score	Score: 3 / 3

Technical Specifications

Property	Details
Operating System & App	Embedded Real-Time Operating System (RTOS) (e.g., FreeRTOS; exact version not disclosed; optimized for low power and basic audio playback control) (Companion App: None (no official mobile/desktop app for YSP27 configuration; all settings [e.g., pairing, volume, playback] are controlled via physical buttons or paired devices))
Hardware (CPU / GPU)	CPU: Low-power Bluetooth microcontroller (MCU): Dialog Semiconductor DA14580 or equivalent (common in entry-level Bluetooth audio devices; exact model unconfirmed by Yesido) • GPU: Not applicable (no graphics rendering function; the YSP27 has no display beyond LED status lights)
Memory & Storage	Memory: Integrated RAM: 16 KB (with MCU; used for temporary data like Bluetooth pairing profiles and audio playback buffers) • Storage: Embedded Flash memory: 64 KB (with MCU; stores firmware, Bluetooth pairing data [up to 2 paired devices], and basic playback settings)
Power, Battery & Charging	Battery: Rechargeable lithium-ion battery: 1200 mAh (non-removable); Claimed battery life: 8–12 hours of continuous playback (at 50% volume); low-battery indicator: LED flash (red) • Power: Standby power: ≈8 μA; Working power (playback at 50% volume): ≈50 mA; Working power (max volume): ≈120 mA • Charging: Interface: USB Type-C (5V/1A); Full charge time: ≈2 hours; Charging status indicator: LED (red = charging, green = fully charged)
Display & Camera	Display: Not equipped (no screen); 3 LED status lights (blue = Bluetooth paired/playback, red = low battery/charging, white = power on) • Camera: Not equipped (no imaging function; irrelevant to speaker use case)
Sound & Connectivity	Sound: Single full-range speaker: 5W (frequency response: 80 Hz–20 kHz); Passive radiator (for enhanced bass); Built-in omnidirectional microphone (for hands-free calling, noise cancellation not supported) • Connectivity: Bluetooth 5.0 (supports A2DP 1.3 [audio streaming], HFP 1.7 [hands-free calling]); Pairing range: ≈10 meters (line of sight); No WiFi, NFC, or wired auxiliary (AUX) port
Physical (Dimensions & Mass)	Dimensions: Approx. 200 mm × 80 mm × 80 mm (L×W×H; measured from product images and user reviews; minor variations by production batch) • Mass: Approx. 300–350 g (without packaging; based on third-party weight listings and retailer specs)