Archiv: CPUs

13.02.2019 - 18:19 [ Financial Times ]

Huawei accuses US of ‘political’ campaign against telecoms group

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“Some say that because these countries are using Huawei equipment, it makes it harder for US agencies to obtain these countries’ data,” he added.

Mr Xu also revealed that Huawei would spend more than $2bn to restructure the code used in its telecoms services worldwide after a series of “confrontational” meetings with Britain’s cyber security agency over the issue.

13.02.2019 - 18:01 [ ]

Huawei Works With Arm, Not Intel, on New CPU

(7.1.2019) William Xu, director of the board and chief strategy marketing officer of Huawei, noted that Huawei had worked extensively with Intel. But he said a diversity of applications and data is driving varied computing requirements. “Huawei has long partnered with Intel to make great achievements,” said Xu in a statement. “Together we have contributed to the development of the ICT industry. Huawei and Intel will continue our long-term strategic partnerships and continue to innovate together.”

13.02.2019 - 17:56 [ ]

Don’t use Huawei phones, say heads of FBI, CIA, and NSA

During his testimony, FBI Director Chris Wray said the government was “deeply concerned about the risks of allowing any company or entity that is beholden to foreign governments that don’t share our values to gain positions of power inside our telecommunications networks.” He added that this would provide “the capacity to maliciously modify or steal information. And it provides the capacity to conduct undetected espionage.”

13.02.2019 - 12:38 [ Universität Tel Aviv ]

Stealing Keys from PCs using a Radio: Cheap Electromagnetic Attacks on Windowed Exponentiation

(April 2015) Q1: What information is leaked by the electromagnetic emanations from computers?

This depends on the specific computer hardware. We have tested numerous laptop computers, and found the following:
In almost all machines, it is possible to tell, with sub-millisecond precision, whether the computer is idle or performing operations.
On many machines, it is moreover possible to distinguish different patterns of CPU operations and different programs.
Using GnuPG as our study case, we can, on some machines:
distinguish between the spectral signatures of different RSA secret keys (signing or decryption), and fully extract decryption keys, by measuring the laptop’s electromagnetic emanations during decryption of a chosen ciphertext.

13.02.2019 - 12:23 [ Wikipedia ]

Out-of-order execution

The high logical complexity of the out-of-order technique is the reason that it did not reach mainstream machines until the mid-1990s. Many low-end processors meant for cost-sensitive markets still do not use this paradigm due to the large silicon area required for its implementation. Low power usage is another design goal that is harder to achieve with an out-of-order execution (OoOE) design.

A vulnerability in some microprocessor manufacturers‘ implementations of the out-of-order execution mechanism was reported to the manufacturers on June 1, 2017, but which was not publicized until January 2018, …

13.02.2019 - 12:03 [ ]

New Spectre attack variant can pry secrets from Intel’s SGX protected enclaves

(2.3.2018) The so-called SgxPectre side-channel attack affects programs with sensitive components protected by Intel’s SGX or Software Guard Extensions enclaves.

SGX is available in newer Intel Core chips and allows developers to selectively isolate sensitive application code and data to run in their own execution environment.

13.02.2019 - 11:59 [ Jennifer Fernick ‏/ Twitter ]

From “FORESHADOW: Extracting the Keys to the Intel SGX Kingdom with Transient Out-of-Order Execution”: Leaky chip, side channel leakage, and hostile OS = decrypting ~100% of the data, ~100% of the time. #realworldcrypto


13.02.2019 - 11:55 [ ]

Practical Enclave Malware with Intel SGX

(8.2.2019) Modern CPU architectures offer strong isolation guarantees towards user applications in the form of enclaves. For instance, Intel’s threat model for SGX assumes fully trusted enclaves, yet there is an ongoing debate on whether this threat model is realistic. In particular, it is unclear to what extent enclave malware could harm a system. In this work, we practically demonstrate the first enclave malware which fully and stealthily impersonates its host application. Together with poorly-deployed application isolation on personal computers, such malware can not only steal or encrypt documents for extortion, but also act on the user’s behalf, e.g., sending phishing emails or mounting denial-of-service attacks.

03.05.2018 - 11:09 [ ]

Super-GAU für Intel: Weitere Spectre-Lücken im Anflug

Insgesamt zeigen die Spectre-NG-Lücken, dass Spectre und Meltdown keine einmaligen Ausrutscher waren. Es handelt sich eben nicht um ein simples Loch, das man mit ein paar Flicken nachhaltig stopfen könnte. Es verdichtet sich vielmehr das Bild einer Art Schweizer Käse: Für jedes abgedichtete Loch, tauchen zwei andere auf. Das ist die Folge davon, dass bei der Prozessorentwicklung der letzten zwanzig Jahre Sicherheitserwägungen immer nur die zweite Geige gespielt haben.