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Making EEPROMs a Safe Place for Sensitive Data
The Atmel CryptoMemory® family offers a range of cost-efficient, high-security electrically erasable programmable read-only memory chips (EEPROMs) and host-side security for applications requiring comprehensive data protection, including mutual authentication between devices and host. CryptoMemory chips are the world's largest family of EEPROMs with a 64-bit embedded hardware encryption engine, four sets of nonreadable, 64-bit authentication keys, and four sets of nonreadable, 64-bit session encryption keys. The result: a truly secure means of preventing product counterfeiting and piracy. The chip family features a choice of memory densities and is easy to implement in a variety of applications.
Key Features
- Designer's choice — The chips are available in memory densities ranging from 1 Kbit to 256 Kbits to accommodate diverse storage and cost requirements.
- Multiple access levels — User memory can be divided into as many as 16 separate sections, allowing several different levels of read and write access.
- No special expertise — A CryptoMemory design kit offers a library of simple API calls that execute the most complex host operations.
- Standard interfaces — The chips provide standard 2-wire communication interfaces to Atmel and other microcontrollers, as well as a standard smart card interface to off-the-shelf readers.
- Package options — Options include 8-lead SOIC, TSSOP, uDFN, and PDIP plastic packages, modules for smartcard applications, and wafers thinned down to 6 mils.
- Host-side simplicity — The Atmel CryptoCompanion™ chip provides simple, plug-and-play authentication on a host device.
Atmel CryptoMemory Devices
| Device Family |
Summary Benefit |
Applications |
Technologies |
Key Parameters |
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Family of secure EEPROMs
64-bit embedded hardware encryption engine
EEPROM densities from 1 to 8 kbit available
Flexible security feature set to meet a wide variety of applications
Supports both 2-wire and ISO7816 interface protocols
Mutual authentication capability |
Applications requiring authentication, data protection or secure storage |
64-bit Cryptographic Algorithm
Secure EEPROM technology
Hardware Security technology |
Hardware security
Secure EEPROM
Authentication |
Voltage Range: 2.7V-3.6V. Memory Density: 1-kbit to 8-kbit.
CryptoMemory chips are equipped with a 64-bit embedded hardware encryption engine, four sets of nonreadable, 64-bit authentication keys, and four sets of nonreadable, 64-bit session encryption keys. A cryptographic algorithm encrypts data and passwords, and generates message authentication codes, providing a secure place where information remains safe — even under attack.
CryptoMemory chips can connect to virtually any microcontroller. Atmel offers interface software free of charge for quick implementation. The chips provide standard communication interfaces to microcontrollers and off-the-shelf readers that include a synchronous 2-wire interface (TWI) and an asynchronous interface (ISO 7816-3 in T=0 Mode) for smartcard applications. All CryptoMemory chips are pin-compatible with Atmel’s serial EEPROMs, allowing for security updates without a design overhaul.
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Family of secure EEPROMs
64-bit embedded hardware encryption engine
EEPROM densities up to 256 kbits available
Flexible security feature set to meet a wide variety of applications
Supports both 2-wire and ISO7816 interface protocols
Mutual authentication capability |
Applications requiring authentication, data protection or secure storage |
64-bit Cryptographic Algorithm
Secure EEPROM technology
Hardware Security technology |
Hardware security
Secure EEPROM
Authentication |
Voltage Range: 2.7V-5.5V. Memory Density: 1-kbit to 256-kbit.
CryptoMemory chips are equipped with a 64-bit embedded hardware encryption engine, four sets of nonreadable, 64-bit authentication keys, and four sets of nonreadable, 64-bit session encryption keys. A cryptographic algorithm encrypts data and passwords, and generates message authentication codes, providing a secure place where information remains safe — even under attack. For maximum flexibility, the chips are offered in both 2.7V–5.5V and 2.7V–3.6V power ranges, and in memory densities from 1Kbps to 256Kbps.
CryptoMemory chips can connect to virtually any microcontroller. Atmel offers interface software free of charge for quick implementation. The chips provide standard communication interfaces to microcontrollers and off-the-shelf readers that include a synchronous 2-wire interface (TWI) and an asynchronous interface (ISO 7816-3 in T=0 Mode) for smartcard applications. All CryptoMemory chips are pin-compatible with Atmel’s serial EEPROMs, allowing for security updates without a design overhaul.
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CryptoCompanion
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Security companion chip to CryptoMemory
Securely implements host algorithms and stores host secrets
Verifies host firmware digests |
Plug-and-play host-side cryptographic security for embedded systems |
64-bit Cryptographic Algorithm
Secure EEPROM technology
Hardware Security technology
Random Number Generator |
Host-side security
Hardware security |
To validate the authenticity of a consumable or replaceable item (a client) when it is connected to a system (a host), there must be some secret information stored in both the client and the host. The CryptoMemory or CryptoRF chips provide a secure location to store this secret data in the client, while the CryptoCompanion chip stores the information in the host. CryptoCompanion provides plug-and-play host-side cryptographic security for embedded systems. This plug-and-play convenience means that designers do not have to design or test the cryptographic algorithms. The companion chip implements the necessary algorithms and the entire protocol completely in hardware. The chip is fully tested and guaranteed to work with all Atmel CryptoMemory and CryptoRF chips.
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