DS1954B Cryptographic iButton™
DS1954B Cryptographic iButton™, from Dallas Semiconductor, Inc., holds FIPS 140-1 certificate #41 at overall level 3. The validation is historical: agencies may keep the module in existing systems but not buy it new. Below are its validation history, algorithm certificates and security policy, drawn from the NIST CMVP entry.
Caveat: When using vendor-initialized SHA-1 in transaction group 1
Certificate
| Certificate number | 41 |
|---|---|
| Standard | FIPS 140-1 |
| Status | historical |
| Overall level | 3 |
| Module type | Hardware |
| Embodiment | Multi-chip standalone |
| Vendor | Dallas Semiconductor, Inc. · website |
| Hardware versions | ID: B4-V1.02 |
Module description
Quoted from the NIST CMVP entry for this certificate.
Provides hardware cryptographic services (e.g., secure private key storage, high-speed math accelerator for 1024-bit public key crypto, hashing). Services are provided using a single silicon chip packaged in a 16mm stainless steel case. Can be worn or attached to an object for info at point of use. Can withstand harsh outdoor environments and is durable for everyday wear.
Security level exceptions
- Physical Security: Level 3 +EFP
Approved algorithms (1)
| Algorithm | CAVP certificates |
|---|---|
| SHA-1 | 8 |
Other algorithms
MD5; RSA
Validation history
| Date | Type | Lab |
|---|---|---|
| 1999-01-26 | Initial | CYGNACOM SOLUTIONS INC |
Status timeline
As observed by this tracker's snapshots. NIST publishes no dates for list moves; observation began 2026-08-21, so earlier changes carry no date.
- 2026-08-21: first observed by this tracker, status historical
- Validation dates on record: 1999-01-26