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Man-in-the-middle attack

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94: 69:, in which the attacker makes independent connections with the victims and relays messages between them to make them believe they are talking directly to each other over a private connection, when in fact the entire conversation is controlled by the attacker. In this scenario, the attacker must be able to intercept all relevant messages passing between the two victims and inject new ones. This is straightforward in many circumstances; for example, an attacker within range of a 334:. To detect potential attacks, parties check for discrepancies in response times. For example: Say that two parties normally take a certain amount of time to perform a particular transaction. If one transaction, however, were to take an abnormal length of time to reach the other party, this could be indicative of a third party's interference inserting additional latency in the transaction. 299:, in which both the server and the client validate the other's communication, covers both ends of a MITM attack. If the server or client's identity is not verified or deemed as invalid, the session will end. However, the default behavior of most connections is to only authenticate the server, which means mutual authentication is not always employed and MITM attacks can still occur. 312:(HPKP), sometimes called "certificate pinning", helps prevent a MITM attack in which the certificate authority itself is compromised, by having the server provide a list of "pinned" public key hashes during the first transaction. Subsequent transactions then require one or more of the keys in the list must be used by the server in order to authenticate that transaction. 306:), or recorded attestments such as audio/visual recordings of a public key hash are used to ward off MITM attacks, as visual media is much more difficult and time-consuming to imitate than simple data packet communication. However, these methods require a human in the loop in order to successfully initiate the transaction. 76:
As it aims to circumvent mutual authentication, a MITM attack can succeed only when the attacker impersonates each endpoint sufficiently well to satisfy their expectations. Most cryptographic protocols include some form of endpoint authentication specifically to prevent MITM attacks. For example,
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This example shows the need for Alice and Bob to have a means to ensure that they are truly each using each other's public keys, and not the public key of an attacker. Otherwise, such attacks are generally possible, in principle, against any message sent using public-key technology.
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wishes to intercept the conversation to eavesdrop (breaking confidentiality) with the option to deliver a false message to Bob under the guise of Alice (breaking non-repudiation). Mallory would perform a man-in-the-middle attack as described in the following sequence of events.
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surveillance device that mimics a wireless carrier cell tower in order to force all nearby mobile phones and other cellular data devices to connect to it. The tracker relays all communications back and forth between cellular phones and cell towers.
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access to its customers' encrypted browser traffic. Nokia responded by saying that the content was not stored permanently, and that the company had organizational and technical measures to prevent access to private information.
295:(CA). If the original key to authenticate this CA has not been itself the subject of a MITM attack, then the certificates issued by the CA may be used to authenticate the messages sent by the owner of that certificate. Use of 267:
All cryptographic systems that are secure against MITM attacks provide some method of authentication for messages. Most require an exchange of information (such as public keys) in addition to the message over a
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Sasikaladevi, N. and D. Malathi. 2019. “Energy Efficient Lightweight Mutual Authentication Protocol (REAP) for MBAN Based on Genus-2 Hyper-Elliptic Curve.” Wireless Personal Communications 109(4):2471–88.
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from what is suspected to be an attack can be analyzed in order to determine whether there was an attack and, if so, determine the source of the attack. Important evidence to analyze when performing
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MITM attacks can be prevented or detected by two means: authentication and tamper detection. Authentication provides some degree of certainty that a given message has come from a legitimate source.
876: 1016: 344:. Protocols based on quantum cryptography typically authenticate part or all of their classical communication with an unconditionally secure authentication scheme. As an example 1450: 345: 1404: 221:
However, because it was actually encrypted with Mallory's key, Mallory can decrypt it, read it, modify it (if desired), re-encrypt with Bob's key, and forward it to Bob:
1311: 276:, have been developed with different security requirements for the secure channel, though some have attempted to remove the requirement for any secure channel at all. 563: – a cryptographic guarantee of the authenticity of a text, usually the result of a calculation only the author is expected to be able to perform. 1045: 898:"Development of field programmable gate array–based encryption module to mitigate man-in-the-middle attack for nuclear power plant data communication network" 62:
between two parties who believe that they are directly communicating with each other, as the attacker has inserted themselves between the two user parties.
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against MITM attacks. In such structures, clients and servers exchange certificates which are issued and verified by a trusted third party called a
931:"Detection of man-in-the-middle attacks using physical layer wireless security techniques: Man-in-the-middle attacks using physical layer security" 1156: 330:
Latency examination can potentially detect the attack in certain situations, such as with long calculations that lead into tens of seconds like
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extends the DNS protocol to use signatures to authenticate DNS records, preventing simple MITM attacks from directing a client to a malicious
1674: 1338: 1020: 1426: 461:, a wireless communication protocol, has also been susceptible to man-in-the-middle attacks due to its wireless transmission of data. 1447: 1526: 745: 315: 1394: 1377: 1315: 1179: 781: 608: 507:
uses MITM attacks to inject JavaScript code to 3rd party web pages, showing their own ads and messages on top of the pages
511: 1827: 256: 1832: 1791: 1482: 1059: 539: – the plot against Elizabeth I of England, where Francis Walsingham intercepted the correspondence. 557: – the art of deciphering encrypted messages with incomplete knowledge of how they were encrypted. 533: – a British radio transmitter used for World War II "intrusion" operations, an early MITM attack. 527:– a technique by which an attacker sends Address Resolution Protocol messages onto a local area network 1679: 1134:
Heinrich, Stuart (November 28, 2013). "Public Key Infrastructure based on Authentication of Media Attestments".
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Callegati, Franco; Cerroni, Walter; Ramilli, Marco (2009). "Man-in-the-Middle Attack to the HTTPS Protocol".
587: – a cryptographic protocol for establishing a key in which both parties can have confidence. 288: 808: 575: – a specific protocol to circumvent a MITM attack when the keys may have been compromised. 452: 1204: 331: 773: 629: â€“ Cyber attack in which a person or program successfully masquerades as another by falsifying data 1765: 877:"From cookie theft to BEC: Attackers use AiTM phishing sites as entry point to further financial fraud" 1633: 280: 200:
Alice encrypts a message with what she believes to be Bob's key, thinking that only Bob can read it:
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Mallory replaces Bob's key with her own, and relays this to Alice, claiming that it is Bob's key:
1643: 309: 1427:"Comcast using man-in-the-middle attack to warn subscribers of potential copyright infringement" 862: 581: – how to manage cryptographic keys, including generation, exchange and storage. 1694: 1521: 1086: 596: 584: 425: 409: 389: 273: 1628: 1164:
2009 Third International Conference on Emerging Security Information, Systems and Technologies
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capability from the server response, they can easily downgrade the connection to plaintext.
764: 711: 614: 599: – a similar attack, giving only regular access to a communication channel. 548: 337: 8: 1750: 834: 712:"Monsters in the Middleboxes: Introducing Two New Tools for Detecting HTTPS Interception" 766:
Why TLS Is Better Without STARTTLS: A Security Analysis of STARTTLS in the Email Context
471: – the first public implementation of MITM attacks against SSL and SSHv1 1735: 1572: 1552: 1185: 1135: 1104: 997: 930: 763:
Poddebniak, Damian; Ising, Fabian; Böck, Hanno; Schinzel, Sebastian (August 13, 2021).
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hosting a network without encryption could insert themselves as a man in the middle.
35: 17: 1189: 1001: 617: – the use of quantum mechanics to provide security in cryptography. 1775: 1740: 1468: 1365: 1167: 1108: 1096: 989: 942: 909: 749: 566: 498:
Content Gateway – used to perform inspection of SSL traffic at the
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Mallory relays this message to Bob; Bob cannot tell it is not really from Alice:
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Whether other clients, elsewhere on the Internet, received the same certificate
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Merkle, Ralph C (April 1978). "Secure Communications Over Insecure Channels".
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withdrew its mobile phone apps following concern about MITM vulnerabilities.
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2012 International Conference on Computing, Communication and Applications
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protocol that requires an adversary with a man-in-the-middle position.
611: – a protocol for establishing a key using a password. 1648: 1598: 1254: 946: 881: 489: 458: 421: 1339:"Here's Why Equifax Yanked Its Apps From Apple And Google Last Week" 1140: 302:
Attestments, such as verbal communications of a shared value (as in
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Bob thinks that this message is a secure communication from Alice.
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Other notable real-life implementations include the following:
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Alice sends a message to Bob, which is intercepted by Mallory:
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In 2011, a security breach of the Dutch certificate authority
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can authenticate one or both parties using a mutually trusted
1250:"Florida Cops' Secret Weapon: Warrantless Cellphone Tracking" 432: 373: 1278:"DigiNotar Files for Bankruptcy in Wake of Devastating Hack" 728:
Usable Authentication Ceremonies in Secure Instant Messaging
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merely shows evidence that a message may have been altered.
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Elakrat, Mohamed Abdallah; Jung, Jae Cheon (June 1, 2018).
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where the attacker secretly relays and possibly alters the
1358:"Analysis of Bluetooth threats and v4.0 security features" 636: 545: – the design of secure computer systems. 480: 709: 1157:"Detecting Man-in-the-Middle Attacks by Precise Timing" 979: 439:
was revealed to be decrypting HTTPS traffic on Nokia's
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Whether the certificate has been signed by a trusted
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Wang, Le; Wyglinski, Alexander M. (October 1, 2014).
1395:"NSA disguised itself as Google to spy, say reports" 1060:"diffie hellman - MiTM on RSA public key encryption" 394:Whether the certificate has been changed recently 1814: 1356:Sandhya, S; Devi, K A Sumithra (February 2012). 1223:"Network Forensic Analysis of SSL MITM Attacks" 551: – a man-in-the-middle exploit. 97:An illustration of the man-in-the-middle attack 1014: 1476: 1337:Weissman, Cale Guthrie (September 15, 2017). 1113:Received August, 1975; revised September 1977 928: 710:Gabbi Fisher; Luke Valenta (March 18, 2019). 635: – a downgrade attack on the 593: – a type of web browser MITM 1154: 935:Wireless Communications and Mobile Computing 379:Whether the certificate has been self signed 1355: 1241: 1070: 895: 746:"Fact Sheet: Machine-in-the-Middle Attacks" 1483: 1469: 1205:"5. Unconditionally secure authentication" 734:(Dipl.-Ing.). Technische UniversitĂ€t Wien. 1139: 1090: 913: 703: 1448:Finding Hidden Threats by Decrypting SSL 1336: 1155:Aziz, Benjamin; Hamilton, Geoff (2009). 1133: 250: 92: 1407:from the original on September 15, 2013 150:"Hi Bob, it's Alice. Give me your key." 125:"Hi Bob, it's Alice. Give me your key." 65:One example of a MITM attack is active 1815: 1527:Timeline of computer viruses and worms 1275: 1247: 1076: 424:resulted in the fraudulent issuing of 160:Bob responds with his encryption key: 1464: 1392: 1309: 1040: 1038: 975: 973: 958: 956: 724: 1393:Moyer, Edward (September 12, 2013). 1202: 1015:Tanmay Patange (November 10, 2013). 982:IEEE Security & Privacy Magazine 609:Password-authenticated key agreement 403: 351: 512:Kazakhstan man-in-the-middle attack 325: 13: 1490: 1276:Zetter, Kim (September 20, 2011). 1035: 970: 953: 902:Nuclear Engineering and Technology 809:"Manipulator-in-the-middle attack" 725:Fassl, Matthias (April 23, 2018). 718: 14: 1844: 1792:Computer and network surveillance 1441: 1310:Meyer, David (January 10, 2013). 388:Whether the certificate has been 262: 363:on a suspected attack includes: 1419: 1386: 1349: 1330: 1303: 1269: 1215: 1196: 1148: 1127: 1118: 1052: 1008: 922: 889: 1507:Comparison of computer viruses 1227:NETRESEC Network Security Blog 869: 855: 827: 801: 774:30th USENIX Security Symposium 756: 738: 651: 272:. Such protocols, often using 1: 1746:Data loss prevention software 1314:. Gigaom, Inc. Archived from 1248:Zetter, Kim (March 3, 2014). 696: 289:Transmission Control Protocol 790:Meddler-in-the-Middle (MitM) 346:Wegman-Carter authentication 7: 1064:Cryptography Stack Exchange 517: 207:"Meet me at the bus stop!" 105:wishes to communicate with 10: 1849: 1766:Intrusion detection system 1370:10.1109/iccca.2012.6179149 376:certificate of the server 88: 15: 1828:Computer network security 1784: 1723: 1667: 1634:Privacy-invasive software 1581: 1535: 1499: 1453:October 18, 2017, at the 1172:10.1109/SECURWARE.2009.20 1079:Communications of the ACM 915:10.1016/j.net.2018.01.018 671:manipulator-in-the-middle 281:public key infrastructure 27:Form of message tampering 22:Meet-in-the-middle attack 1833:Transport Layer Security 843:. Mozilla. July 13, 2022 644: 367:IP address of the server 357:Captured network traffic 285:Transport Layer Security 16:Not to be confused with 1644:Rogue security software 683:adversary-in-the-middle 477:HTTP(S) diagnostic tool 310:HTTP Public Key Pinning 274:key-agreement protocols 232:"Meet me at the park!" 1680:Classic Mac OS viruses 1522:List of computer worms 1457:(PDF). SANS Institute. 1364:. IEEE. pp. 1–4. 863:"Person-in-the-middle" 597:Man-on-the-side attack 585:Key-agreement protocol 531:Aspidistra transmitter 410:Stingray phone tracker 370:DNS name of the server 98: 1823:Cryptographic attacks 1101:10.1145/359460.359473 813:OWASP Community Pages 792:attacker removes the 667:meddler-in-the-middle 663:machine-in-the-middle 659:monster-in-the-middle 603:Mutual authentication 443:, giving the company 384:certificate authority 297:mutual authentication 293:certificate authority 251:Defense and detection 96: 83:certificate authority 1802:Operation: Bot Roast 1433:. November 23, 2015. 1048:. December 28, 2016. 1023:on November 24, 2013 966:. December 11, 2017. 675:person-in-the-middle 615:Quantum cryptography 549:Cookiemonster attack 338:Quantum cryptography 1751:Defensive computing 1668:By operating system 994:10.1109/MSP.2009.12 865:. October 11, 2020. 1736:Antivirus software 1582:Malware for profit 1553:Man-in-the-browser 1500:Infectious malware 1203:Cederlöf, Jörgen. 1166:. pp. 81–86. 815:. OWASP Foundation 591:Man-in-the-browser 573:Interlock protocol 342:no-cloning theorem 99: 71:Wi-Fi access point 1810: 1809: 1761:Internet security 1715:HyperCard viruses 1624:Keystroke logging 1614:Fraudulent dialer 1558:Man-in-the-middle 1379:978-1-4673-0273-9 1181:978-0-7695-3668-2 783:978-1-939133-24-3 752:. March 24, 2020. 561:Digital signature 543:Computer security 483:impersonation of 404:Notable instances 361:network forensics 352:Forensic analysis 40:man-in-the-middle 36:computer security 18:Man-in-the-Mobile 1840: 1776:Network security 1741:Browser security 1485: 1478: 1471: 1462: 1461: 1435: 1434: 1423: 1417: 1416: 1414: 1412: 1390: 1384: 1383: 1353: 1347: 1346: 1334: 1328: 1327: 1325: 1323: 1318:on April 8, 2019 1307: 1301: 1300: 1298: 1296: 1273: 1267: 1266: 1264: 1262: 1245: 1239: 1238: 1236: 1234: 1229:. March 27, 2011 1219: 1213: 1212: 1200: 1194: 1193: 1161: 1152: 1146: 1145: 1143: 1131: 1125: 1122: 1116: 1115: 1094: 1074: 1068: 1067: 1056: 1050: 1049: 1042: 1033: 1032: 1030: 1028: 1019:. Archived from 1012: 1006: 1005: 977: 968: 967: 960: 951: 950: 947:10.1002/wcm.2527 926: 920: 919: 917: 893: 887: 886: 885:. July 12, 2022. 873: 867: 866: 859: 853: 852: 850: 848: 831: 825: 824: 822: 820: 805: 799: 798: 776:. p. 4366. 771: 760: 754: 753: 750:Internet Society 742: 736: 735: 733: 722: 716: 715: 707: 690: 657:Also known as a 655: 567:Evil maid attack 326:Tamper detection 257:Tamper detection 237: 234:→     230: 226: 216: 212: 209:→     205: 195: 191: 186:    ← 185: 175: 170:    ← 169: 165: 155: 152:→     148: 144: 134: 130: 127:→     123: 1848: 1847: 1843: 1842: 1841: 1839: 1838: 1837: 1813: 1812: 1811: 1806: 1785:Countermeasures 1780: 1771:Mobile security 1719: 1710:Palm OS viruses 1675:Android malware 1663: 1577: 1573:Zombie computer 1531: 1495: 1489: 1455:Wayback Machine 1444: 1439: 1438: 1425: 1424: 1420: 1410: 1408: 1391: 1387: 1380: 1354: 1350: 1335: 1331: 1321: 1319: 1308: 1304: 1294: 1292: 1274: 1270: 1260: 1258: 1246: 1242: 1232: 1230: 1221: 1220: 1216: 1201: 1197: 1182: 1159: 1153: 1149: 1132: 1128: 1123: 1119: 1092:10.1.1.364.5157 1075: 1071: 1058: 1057: 1053: 1044: 1043: 1036: 1026: 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1488: 1487: 1480: 1473: 1465: 1459: 1458: 1443: 1442:External links 1440: 1437: 1436: 1418: 1385: 1378: 1348: 1329: 1302: 1268: 1240: 1214: 1195: 1180: 1147: 1126: 1117: 1085:(4): 294–299. 1069: 1051: 1034: 1007: 969: 952: 941:(4): 408–426. 921: 908:(5): 780–787. 888: 868: 854: 826: 800: 782: 755: 737: 717: 701: 700: 698: 695: 692: 691: 649: 648: 646: 643: 641: 640: 630: 624: 621:Secure channel 618: 612: 606: 600: 594: 588: 582: 579:Key management 576: 570: 564: 558: 552: 546: 540: 537:Babington Plot 534: 528: 521: 519: 516: 515: 514: 508: 502: 493: 487: 478: 472: 437:Xpress Browser 414:cellular phone 405: 402: 401: 400: 399: 398: 395: 392: 386: 380: 371: 368: 353: 350: 332:hash functions 327: 324: 270:secure channel 264: 263:Authentication 261: 252: 249: 244: 243: 240: 239: 238: 227:    219: 218: 217: 213:    198: 197: 196: 192:    178: 177: 176: 166:    158: 157: 156: 145:    137: 136: 135: 131:    90: 87: 60:communications 52:on-path attack 26: 9: 6: 4: 3: 2: 1845: 1834: 1831: 1829: 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Meanwhile, 108: 104: 95: 86: 84: 80: 74: 72: 68: 67:eavesdropping 63: 61: 57: 53: 49: 45: 41: 37: 33: 23: 19: 1568:Trojan horse 1557: 1548:Clickjacking 1430: 1421: 1409:. Retrieved 1398: 1388: 1361: 1351: 1343:Fast Company 1342: 1332: 1320:. Retrieved 1316:the original 1305: 1293:. Retrieved 1281: 1271: 1259:. Retrieved 1253: 1243: 1231:. Retrieved 1226: 1217: 1208: 1198: 1163: 1150: 1129: 1120: 1112: 1082: 1078: 1072: 1063: 1054: 1027:November 25, 1025:. Retrieved 1021:the original 1010: 985: 981: 938: 934: 924: 905: 901: 891: 880: 871: 857: 845:. Retrieved 840:MDN Web Docs 838: 829: 817:. 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Index

Man-in-the-Mobile
Meet-in-the-middle attack
cryptography
computer security
cyberattack
communications
eavesdropping
Wi-Fi access point
TLS
certificate authority

Alice
Bob
Mallory
Tamper detection
secure channel
key-agreement protocols
public key infrastructure
Transport Layer Security
Transmission Control Protocol
certificate authority
mutual authentication
ZRTP
HTTP Public Key Pinning
DNSSEC
IP address
hash functions
Quantum cryptography
no-cloning theorem
Wegman-Carter authentication

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