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Computer added entropy: a look at trezor and cold card flaws

Computer Entropy Debate | Trezor vs ColdCard Flaw Sparks Controversy

By

John Lee

Aug 5, 2026, 06:24 PM

2 minutes estimated to read

A Trezor device connected to a computer, illustrating how it enhances security, next to a ColdCard device showcasing its flaws in entropy generation.

A heated debate is unfolding among crypto hardware users regarding a potential design flaw in popular wallet brands. Reports suggest that Trezor may have a safeguard against a vulnerability present in ColdCard, with users questioning the implications of connecting Trezor devices to computers for seed generation.

Trezor's Advantages in Seed Generation

Some users argue that connecting a Trezor mk3 to a computer via USB adds sufficient entropy to the seed generation process, potentially mitigating risks. A comment highlighted that "if Trezor had the same flaw as ColdCard, the design would be different."

ColdCard's Fatal Flaw

Users have pointed out that the ColdCard issue largely stems from its power source and internal processes. One noted, "Power source doesn’t matter for the ColdCard issue." This comment reinforces concerns about the ColdCard's exposure to vulnerabilities even when updates or external additions are made.

Trusting the Code

The integrity of the firmware has come under scrutiny as well. "Any code can either have bugs or malicious intention," one user stated, emphasizing the importance of thorough checks before updating firmware on these devices. This sentiment underscores a growing distrust within the community regarding the devices' software validation methods.

"Before I flashed firmware on my ColdCard, I downloaded all source code…" - A user's experience with the firmware check.

Key Insights

  • β–³ Entropy Addition: Trezor's connection may offer improved seed security.

  • β–½ ColdCard Risks: Concerns persist regarding direct vulnerabilities tied to power-source design.

  • β€» Firmware Trust: Users urge caution when updating firmware to avoid bugs or malicious code.

As the debate continues, experts urge users to remain vigilant. The question lingers: can these hardware wallets guarantee safety in an ever-evolving crypto landscape? Attention to firmware updates and community feedback will shape the future of these devices.

What's Next for Hardware Wallets?

There’s a strong chance that the ongoing discussions about Trezor and ColdCard will prompt manufacturers to focus more on transparency around their firmware and hardware vulnerabilities. Expect to see updates from both brands, possibly launching as early as the next few months, as they aim to regain user trust. Users are increasingly aware of the need for secure seed generation; thus, around 75% may opt for wallets that prioritize community input on firmware security by the end of 2026. This could lead to a shift in the market, pushing companies to adopt clearer communication strategies and security measures in their design processes.

Historical Echoes in Tech Turmoil

The current debate echoes the early days of smartphone security when consumers wrestled with their trust in manufacturers. Just as early smartphone developers faced scrutiny over data protection, hardware wallet companies now find themselves at a crossroads, tasked with assuring users that their coins are safe. Consider how Nokia and BlackBerry’s initial resistance to adapting to more open platforms led to their decline, paving the way for Android and iOS. Similarly, the crypto community's demand for greater accountability may either solidify the standing of some brands or leave them behind amid the surge of innovation and security awareness.